This GUIDE was published in Aug. 2011 (and is now OUTDATED and on Legacy status)
The "NEW" updated 2013 Nvidia Guide is located
HERE:   http://forums.evga.com/fb.ashx?m=1776353
 
 
 
 
 
 
 
 
OUTDATED GUIDE (below)
 *this has no become OUTDATED and will no longer work correctly with Windows and Nvidia driversets
It should ONLY be used for older legacy systems running Nvidia drivers PRIOR to 260.xx
_______________________________
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________
 
 
 
Due to the significant changes in Nvidia driver packages over the last year and the surrounding confusion in how these changes have effected installing and uninstalling Nvidia Drivers, a clear outline of what those changes are and how it effects users has become extremely important.
This guide is intended to help both novice and experienced users understand how Nvidia drivers have changed their install and uninstall behavior when using Windows and what those changes mean.
 
Make no mistake, gone is the "old" way of doing things for the experienced user. What has worked in the past with Nvidia driversets, no longer does so.

And Nvidia's new installer package contains serious pitfalls for novice users, as it does not contain any proper explanation of the proper uninstalling of drivers and provides little guidance or instruction on how to avoid creating issues. Many novice users simply use Nvidia's recommended "Express Install" option, and then find themselves with complex and time consuming problems.
 
This guide will help users learn to install, uninstall and update their Nvidia drivers in a quick and easy fashion, and avoid problems and issues with ease
 
PART ONE:
Known Issues and Changes with current Nvidia driversets and Windows 
*A in-depth explanation of the changes to the current Nvidia driver packages and Windows, and why the old ways of doing things no longer work correctly and should not be used.
 
Nvidia driver development has been undergoing a process of basic and fundamental design and deployment changes over the past few years. Nvidia's PhysX, 3D display drivers and Surround have all seen a process of improvements and refinements, as enhancements to the graphics hardware and software drivers have allowed for more complex display arrangements, features and Windows integration. Nvidia has also moved to a new installer design during this time, and has been making changes there as well...
There has also been a revolution in the access to and use of, third party programs that are able to monitor videocard functions and hardware sensors, as well as providing for user overclocking, user voltage control and user videocard BIOS management.
 
But with such major changes (as always) comes unforeseen conflicts and circumstances, and the problems associated with such unknown or poorly understood issues. 
  
As a "obssessive compulsive old school" type of user, changing the way I have done things with my Nvidia driversets for many many years, has been hard for me to accept....
But changing the way I use and interact with my Nvidia driversets has now become "required" and is no longer optional for the proper use of the lastest Nvidia drivers.
 
Here are the reasons "why" previously working methods can no longer be used 
* the following are direct excerpts from the latest Nvidia "release notes" for the 280.xx family of drivers
-> http://us.download.nvidia.com/Windows/280.26/280.26-Win7-WinVista-Desktop-Release-Notes.pdf  
  
#1 --> Windows Device Manager can no longer be used to uninstall Nvidia drivers 
*(page 28 as shown below)
___________________________________________________________________________
Uninstalling Drivers Using Device Manager is not Supported
 

Issue

On all supported versions of Microsoft Windows, uninstalling the NVIDIA driver using

the Windows Device Manager may not remove associated files or applications.

Explanation

Microsoft has confirmed that this behavior is by design. If you wish to uninstall the

NVIDIA driver, it is recommended that you do so using Add and Remove programs.

See the
Microsoft KB article 2278714.
____________________________________________________________________   
#2 -->You can no longer user the Windows "Roll back" display driver function in Device Manager 
(page 27 as shown below)
____________________________________________________________________________________ 

Do not Use Windows Rollback for Graphics Drivers

To reinstall a previous or older NVIDIA graphics driver, do not use the Windows

rollback feature. This method will not reliably restore all the previous driver files.

Instead, use the Windows Add and Remove programs to remove the current driver, and

then install the older driver using setup.exe

___________________________________________________________________
 
NVIDIA PhysX System Software Cannot be Installed or
Uninstalled in Windows Safe Mode  

The NVIDIA PhysX System Software installer is not compatible with Microsoft

for Windows safe Mode. Consequently, installation or uninstallation of the PhysX

System Software under safe mode would fail. To allow installation or uninstallation of

the graphics driver under safe mode, the NVIDIA PhysX System Software is blocked

from the process.
____________________________________________________________________  
 
#4 --> You cannot "overinstall/overwrite" a 256.xx or below Nvidia driver version when using a 260.xx or higher Nvidia driver. 
(page 27 as shown below)
____________________________________________________________________________________  

Previous Driver Files Remain After Overinstalling with

Release 256 or Earlier Drivers

Issue

When installing a Release 256 or earlier driver over a Release 260 or later driver, some of

the previous driver files remain on the hard disk, resulting in potential conflicts.

Workaround

After installing a Release 260 or later driver, you must uninstall the driver first before

installing a Release 256 or earlier driver.
____________________________________________________________________  ____________________________________________________________________

The changes listed above for Nvidia driver behavior and Windows are substantial and dramatic, compared to how Nvidia driversets worked in the past.
I cannot begin to explain how upsetting and sad it is, to read the postings of users who have failed to understand these changes...
---These newer driversets (260.xx and above) are a different animal---
If you treat them as you always have in the past when using XP, Vista and in Windows 7, you will have all kinds of serious problems and issues. 
Users -can no longer- use Device Manager to "rollback" to a previous driver version. 
Users -can no longer- uninstall Nvidia Drivers or components using Device Manager.
Safe Mode -will not- allow the proper uninstall or install of PhysX. 
Users -cannot- overinstall/overwrite older driversets when using the newer versions.
  
Sadly, Windows and the Nvidia drivers will still allow you to -do- most of the above, blissfully unaware that doing so will result driver corruption, broken registry entries and the resulting problems and issues.
  
Given the current state of Nvidia driver development and its rapid changes, and the constant changing of the Nvidia installer package and its componets...
**I most strongly suggest that no user download or install a newer driver version, without first reading that releases "Release Notes", as these changes are ongoing and will likely become much worse as the Kepler release and DirectX 11.1 approaches....
  
*NOTE: Third party software
Because of the ongoing changes to the recent Nvidia driver packages, it is becoming -extremely- important to have the latest and most recently updated versions of such software, when using -any- third party (monitoring/fan control/overclocking/voltage adjustment, Hardware reporting or "Sweeping"/registry cleaner) software.
Failure to use programs that are properly coded for the newer driver versions can lead to serious (and possibly) damaging results.
**It also needs to be noted, that if you have "done" any of the above listed (unsupported)actions, you could quite possibly have "broken" your driver install, which could lead to third party software performing incorrectly or reporting falsely. Such issues could include loss of Fan speed control, incorrect GPU temp reporting, Driver crashes, PhysX issues and unbalanced GPU loading/temps, Etc.... 
  
Now that we know about "most" of the changes in Nvidia driver behavior and Windows, it's time to cover how we must now treat our Nvidia drivers when Uninstalling or Installing 
  
PART TWO:
Preparing for a new driver install
*for the sake of users who do not have any experience or those who have encountered issues...
-->this section will be very detailed

Ok before we can move on to uninstalling and installing Nvidia driversets, we need to familiarize ourselves with where "Nvidia", third party programs and releated Windows features are, and how they work.
We must go over all the things and places which we will be using, so that when it comes time to do a uninstall or install of Nvidia driversets we will know where things are, how they work and what we will be doing with, or asking of them. 


First up is getting the driver we want to install onto our desktop
Since what we want is a "perfect" driver install, it is always recommended to get a nice fresh Nvidia driver download.
*Do NOT use any disk, previously downloaded driver file or any other source. For users that have had any problems and for the sake eliminating a possible source of issues, a brand new driver download is always best. 
 
While there are many places to download drivers from, the source is always the best.
Go here  http://www.nvidia.com/Download/index.aspx?lang=en-us and choose BETA and Archived Drivers (as shown)  

 
Now (the screenshot below will come up) You must -correctly- choose the information from each flyout out about your videocard series, model, Windows operating system and if its 32 or 64bits.
Then hit the "search" and the Nvidia website will display all the approved Official and Beta drivers for your videocard.
*This will allow you to "choose" whatever driver you wish to download (instead of using the default "latest official" version you would get on the main Nvidia page)

*The above example is filled out correctly for a Nvidia GTX 580 using Windows 7 64bit (flyout choices below)
GeForce/Geforce 500 Series/Geforce GTX 580/Windows 7 64bit/English/ALL
  
*Choosing what Nvidia driver version to download
Ok, now we need to choose what driver version we are going to download.
For most users the latest "official" WHQL signed driver is recommended.
(using a Beta driver will not affect your cards warrenty. I will be covering BETA drivers in another section) 
The drivers available to download are ordered by release dates, with those at the top being the most recent. 
For this example, I will be choosing the latest official WHQL signed Nvidia driver.
-->Release 280.26 released on August 9 2011 (as shown below)
     
*Now before I go all hog wild and just download it blindly, I will need to find and READ the Nvidia release notes for the driver I have chosen, so I can understand any changes that may have been made to the driver package itself and also to see if there are any enhancements, bug fixes -or- "open" issues/problems for certain games or applications I may have installed.      
After clicking on my driver of choice (as shown above) I am now taken to the 280.26 download page.       
        
The above is the "release" page for the 280.26 driveset. It is a quick rundown of what Nvidia "thinks" you should know about the Driver package, and any changes that have been made or included since the previously released driversets.   
It is NOT a complete listing and some major changes are often posted on this page in a manner which makes them very easy to miss.         
What we really need to see it the complete "Release Notes" for the driver before we download it, to see if it has any features or bug fixes we need and to discover if there have been any major changes that we need to be aware of, in case those changes might cause us to have problems.              
To view the complete "Release Notes" click on the "additional information" tab (as shown below)               
                   
*note: the Release Notes are in .PDF format. Get the .PDF viewer here http://get.adobe.com/reader/                  
**(be sure to uncheck the stupid Google bar junk)                    
download driv...ditional1                        
This will bring up the official Nvidia Release Notes for the 280.26 driver                       
   
Now we are in the Right place to read about what kinds of bugs the driver we are looking at has for the games and applications we have installed, and to find out if there are any workarounds. We can also look for any possible FIXES that may have been included in the driver that will fix certain problems we may have been having 
Been wondering why after installing the 280.19 Beta your GPU clocks and Temps have been different?  
why higher cl.. and temps   
Yep, they sure did include a change in the driver behavior  
  
Known Nvidia driver BUGS and issues? Yep, pages of stuff you need to look through to see if any of them affect your model (or series) of Nvidia graphics card.   
    

   

   
CONTINUED in next post....

CONTINUED from second post 
  
Next, we need to make sure that Precision or Afterburner (if installed) is set NOT to start with Windows and is completly ShutDown, while we are uninstalling and installing our Nvidia drivers.
Open the "settings" box, and uncheck "Start with Windows" (shown below)

After changing the setting (if it was used), you must then completly shut the program down.
*This is a very important step, as failure to do so can result in the "wrapper" used by Unwinder in Precision and Afterburner, can fail and cause issues when uninstalling or installing.
**Turn off or shut down -any- monitoring/overclocking/fan control or any other videocard releated software before attempting to uninstall or install a Nvidia driverset.
 
Next up, in the intrest of cleaning up any possible prior issues and avoiding any problems during our reboot into Windows during our uninstall process. It is recommended to delete any older driver packages from their default unpacking location, on the C:/ drive/Nvidia folder (shown below) 

*this is a very important step. If you have improperly uninstalled/rolledback and/or then reinstalled the "same" Nvidia driverset or used System Restore, it is possible that the folder in the unpacking section can become corrupted. It is from this folder that the Nvidia installer package launches, and we dont want to "carry" any previous problems forward. 
**Make sure that there are no numbered Nvidia driverset folders left inside the "display driver" folder.
***Do NOT delete the Nvidia folder or the "display driver" folder inside it. 
****Important Note: If during any previous install you did NOT use the "default" driver unpacking location, and instead chose a different location, you must browse to that location and follow the same steps.  
 
Ok, just a few more things to do...
 
Next up, we want to turn off or shut down any Anti Virus sofware you may have running. As such programs are known to sometimes have issues with Nvidia driver installs or have issues with unsigned drivers. 
 
You should also shutdown and change any settings needed to keep "other" applications like Torrent clients, FRAPS, STEAM, X-fire, Messenging clients, Social app clients, System Monitoring or Windows based overclocking clients Etc (with special attention to ANY programs that use anykind of "overlay").. from wanting to "start with Windows", as such programs can sometimes cause issues, problems or distracting pop ups and messages while we are trying to get our driver installed.
 
Next you need to make sure that your Windows security settings are NOT set higher than "medium" as doing so can sometimes block downloaded programs (like our Driver installer) from running properly or with all functions enabled.
 
Whew! It can be alittle daunting the first time you go thru all this. But after you have done it a few times it really only takes about 4-5 minutes. (much less time than you will ever spend if you end up with driver based issues, because you didnt)
 
We have the Nvidia driver we wish to install on our desktop, and we have properly prepared Windows and our installed programs/apps for switching Nvidia drivers.
 
We are now going to properly Uninstall our current Nvidia driver, in the next section.
_______________________________________________________________________________
_______________________________________________________________________________ 
  
 
Uninstalling our current Nvidia driver is quite simple and straight forward (at least something is easy)
 
Simply go to START, Control Panel and click on "Programs and Features" (then allow the list to populate)
Scroll down to the "N" entries and you will find a section that all start with "Nvidia" (see example below)
 

 
Dont panic if you see more Nvidia listings than shown in the screenshot. This is completly normal, as you may have previously installed other Nvidia driver components. You may see such extra listings as the Nvidia HD audio, Nvidia Update, Nvidia 3D Stereoscopic driver, Nvidia 3D controller and Nvidia Control panel... Ect.  
*Important note: Users of older motherboards with Nvidia chipsets may see Nvidia listings that are unreleated to the Display Drivers. Before proceeding as noted below, you MUST know what the chipset listings are, and AVOID uninstalling them. If you uninstall Nvidia Chipset drivers, your system could become non functional and require a OS reinstall.
 
Now, one at a time.. highlight every Nvidia entry (except the Graphics Driver!!!!) and click "uninstall"... wait till each one is done and says its finished, before proceeding to the next listed entry. Do -ALL- of them until nothing is left but the "Graphics Driver" (with some older drivers it may list "Display Driver" instead...) 
EDIT*Important note: If while uninstalling Nvidia display components, the system asks for a RESTART after uninstalling any component (except the Graphics Display) and it wont let you proceed when choosing "restart later", then its OK go ahead and restart and pick up in the Control Panel/Programs and Features where you left off. (thanks to user jdookie for pointing this issue out)   
 
-> -> DO NOT UNINSTALL THE "GRAPHICS DRIVER" entry, untill ALL other entries have been done FIRST <- <-
 
**this is where alot of users make a mistake, by failing to completly uninstall/remove all the other Nvidia entries before they uninstall the Graphics/Display Driver. Dont make a mistake here, or after your all done installing the new driver... you will have to come back and do it all over again.
 
OK, there are no Nvidia entries left on the list except for the "graphics driver".  
 
Highlight it, and choose Uninstall The system will ask for a RESTART, you should now do so!!
 
Reboot normally, do NOT boot into "safe mode"  
 
_______________________________________________________________________________
_______________________________________________________________________________
OK, installing the driver is also quite simple (as long as Windows behaves itself)
 
Windows should now boot to the destop. You should recive a balloon message that windows has detected a device without a driver, then another message that windows has installed a "Standard VGA adaptor" (this is NOT a display driver), it may then ask for a "Restart"
*EDIT (2/1/12) It appears that a change in how the Standard VGA Adaptor loads, the it is now -recommended that if it asks for a "Restart" that you do so, and then proceed with the below steps.
This is completly normal and will not interfere with our driver install...
(I have personaly had 295.51 fail to properly install, because I skipped restarting after the Standard VGA Adaptor loaded. This is a "change" in how I had installed drivers in the past that uses of this Guide need to be aware of) 
*What you dont want to see, is that Windows wants to install a "3d Display device driver". If you see such a message, attempt to cancel out of the install. This will only happen if you dont have the Admin rights you thought you did. If you "think" Windows tried to install a Nvidia driver on its own, Dont panic. Just wait till its done... Then open the Control Panel, Programs and Features and check the Nvidia listings to see if it did or not. If it DID, then you will need to uninstall in Programs and features (same steps as before), But this time, you will need to disconnect from the internet -before- the final uninstall step (this should keep windows from doing that again). 
 
So your on the desktop and ready to install your new Nvidia driverset
 
"Double click" on the Nvidia driver installer package to start the install.
 
The very first thing you should see is a Windows Security pop up, asking for permission to run the program with Admin Rights.
Click YES
 
Next the Installer will ask for a location to which it will "extract" the Nvidia driverset. (shown below)

This is a place where many novice users make a mistake. Since I already have a Nvidia folder, that is what is showing in my screenshot, the "default" location. But if this is a fresh OS install or you have not used a 260.xx or above driverset before with the new installer, that box in the above screenshot will be BLANK. Do NOT do anything... just click "OK" and the Installer will create the Nvidia folder on your OS drive in its "default" location. That is exactly where you want it. You do NOT want the drivers extracted to ANY other drive or directory.
 
Click "OK" and the drivers will extract.
 
After the driver is finished extracting, the Nvidia licence agreement panel will appear (shown below)  

*The installer will run "System Check" to make sure you have the correct driver for your model of videocard and your OS version. If the System Check fails, it means that you did not correctly choose the right information for your card and OS, and you will need to go back and get the "correct driver".
 
System Check should finish, and the Nvidia licence agreement notice will appear. Click "Agree and Continue"
 
Next up is the "Install Options" panel (shown below) 
 
This is the #1 place that novice users make the very worst mistake possible.
--> Do NOT -ever- use the Nvidia Express Install Option.(recommended my rear end, it can be malware)
 
Do NOT use the Express Install Option-Do NOT use the Express Install Option-Do NOT use the Express Install Option 
 
**As many of thousands of users have discovered the hard way, using the "Express Install Option" has DESTROYED the operating condition of their computers...
--->and in some cases can lead to not even being able to boot normally into Windows.
The reason for this is some very mean person at Nvidia decided that Nvidia's new "HD Audio" product should be included in the "recommended" driver install package. Despite the fact that 97% of current users cannot even use it. And in total disrespect for that fact that is has and continues to cause great hardship, suffering and leaves many users with "broken", "crashing", "unstable" or "Black screen at boot" configs. Installing your drivers with Nvidia's "Express Install Option" can be a NITEMARE for a novice user and is no fun for a expert, and is to be avoided AT ALL COSTS!!    
*While the actual percentage of users affected by this is small, the NUMBER of users affected is not.
Trust me, it is not a flip of the coin you want to risk. Avoid the Nvidia HD Audio driver like the plague.         
           
Luckly, you read this guide and avoided using the "Express Install Option" 
              
-->Please choose the "Custom"(Advanced) Option and click next (as shown in the above screenshot)
 
That brings us to the "Custom installation Options" panel (shown below)
 
As shown above, you want to "uncheck" everything except for the greyed out Graphics Driver and PhysX.
**Note, if the panel above was displaying correctly, you would need to "scroll" down to see the PhysX option.
 
**IMPORTANT: -->you MUST place a check in the box that says "Perform a Clean Installation"
 
Double check that everything but "PhysX" and the greyed out "Graphics Driver" has been unchecked, AND that you have placed a check into the box for a "Clean Installation"
THEN click NEXT
 
Your brand new Nvidia Driver will now Clean Install itself, Congrats
When its done, Click "Finish" and then Restart your computer.
*It is VERY IMPORTANT, that you not do anything or open the NVCP, change any setting or enable SLI or perform any other actions before performing a REBOOT.
This "extra" reboot can really help avoid some known issues and is strongly recommended.
____________________________________________________________________________   
 
**Important note users about why we are unchecking so many items in the Custom Install Panel. 
Its simple, NONE of them are needed to run your graphics card -period- They are BLOATWARE
Unless you own a pair of Nvidia 3D glasses, you do NOT need the "3d Vision driver" or "3d Vision Controller"
The "NVIDIA Update" is just a service to check for newer drivers. Its NOT needed.
The "HD Audio Driver" can cause KNOWN serious problems, and can only really be used if you own a expensive standalone HDMI 1.4 audio receiver. Its NOT needed by anyone else.                   
 
----------------------------------------------------------------------------------------------------------
BUG NOTICE BELOW
---------------------------------------------------------------------------------------------------------- 
EDIT: User Z-Knight has discovered a additional issue when PhysX cannot appear to be installed
          See his fix for the issue HERE http://forums.evga.com/fb.ashx?m=1291625
 
 
-WARNING- The Custom installation Options panel has a BUG.
This presets itself as shown in the above screenshot. I was only running the installer to take the screenshot (I was not actually installing) as such, I had NOT uninstalled my previous driver and components in Programs and features. The installer scanned my system and found I had a version of PhysX installed. Because of the way its programmed, it then FAILED to display a check box option for PhysX or any version infomation. I am uncertain as to if this is because the version I had installed is detected as the "latest" or just that I "have" a PhysX installed...
This is a BUG.
-->Many users are confused by this behavior as they do not think PhysX is installing. Good job Nvidia
 
**Important Notice: for users who get "Driver Failed to Install" notices with the newer drivers..
I belive this BUG is responsible, becuse users who have improperly used Device manager or safe mode may have a older "incompatible" PhysX driver that is not being detected correctly by the "new" installers scanner.
***Such users MUST use Programs and features (not in safe mode) to properly uninstall their Nvidia PhysX driver component. Or the newer drivers will continue to fail during install until this Bug is fixed.   
 
I will now uninstall my previous Nvidia driver and components in Programs and features (as outlined in this guide) and then run the installer for real, and take another screenshot to illustrate this behavior.
 
Below is what you would see "without" uninstalling your previous Nvidia drivers beforehand. 

 
And here is what you will see when you uninstall your driver and components -before- a driver install.

 
Sorry to get side tracked, but this "bug" has even experienced users confused, and many users go so far as to attempt a driver re-install or driver overwrite thinking PhysX is not installing. 
*This is not the case.
Failure to display the PhysX box simply means that... you did Not uninstall PhysX in programs and Features before running the installer.
This is a BUG, and may even be causing some users to experience driver install failure. 
  
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Continued on next POST

Sorry to burst your bubble but there is allready a sticky.http://forums.evga.com/tm.aspx?m=301261

And windows 7 OS is not the same as the OS there guide was made for.
Ty for taking the time to do this.

I know you are still working on the guide. But it has me curious. Are you going to advise removing drivers first and do a reboot then install new ones? Or just install them over the top?

Maniac,
 
A special thanks for bringing this out for novice and experienced users alike to understand.  I have already linked this to many a friend who have been experiencing problems with driver installation lately.

looking forward to this, good stuff

FattysGoneWild

Fresh format today and this info was not here before I done it. Crap.

*this is a very important step. If you have improperly uninstalled/rolledback and/or then reinstalled the "same" Nvidia driverset, it is possible that the folder in the unpacking section can become corrupted. It is from this folder that the Nvidia installer package launches, and we dont want to "carry" any previous problems forward. 
**Make sure that there are no numbered Nvidia driverset folders left inside the "display driver" folder.
***Do NOT delete the Nvidia folder or the "display driver" folder inside it. 
****Important Note: If during any previous install you did NOT use the "default" driver unpacking location, and instead chose a different location, you must browse to that location and follow the same steps.

***Do NOT delete the Nvidia folder or the "display driver" folder inside it.

Yep I done just that! Is that going to cause a problem?

If its a "fresh" OS install, na its not going to be a problem bro.
 
As long as the driver went in clean and without issues... it shouldnt be a problem for you.
 
Dont do that again though...
 
 

I believe that is for if you are removing an existing corrupted or changing to a new driver set in order to keep yourself from corrupting the drivers and registry intentionally. If you had done a fresh format/reinstall of the OS then you won't be removing an older driver set in order to install a fresh updated driver. From reading through this it is for a 'recovery' if you had to roll back to a known previously existing good save point in order to remove bad drivers or correct other issues.
 
[edit]
He beat me to the answer. Should have known.
[/edit]

maniacvvv
Its only about half done.... DOH!

Tut tut tut, can't have you slacking now can we?? chop chop!

Got it. Thanks.

Hey maniac, thanks for all the hard work! As a noob I really appreciate it!
(well, I wasn't a noob 10yrs ago, but being away for so long, I deserve it)
 
Question though, I've always checked the option in the NVIDIA installer to perform a "clean" install. Is it better to manually uninstall like you describe or am I OK having the installer do it?

sotiri

Hey maniac, thanks for all the hard work! As a noob I really appreciate it!
(well, I wasn't a noob 10yrs ago, but being away for so long, I deserve it)

Question though, I've always checked the option in the NVIDIA installer to perform a "clean" install. Is it better to manually uninstall like you describe or am I OK having the installer do it?

Much better to manually uninstall as noted -first-, then Custom/clean install... its a no harm done kinda thing.
 
When installing any Nvidia driverset, always use the Custom/Clean install option 
 
And for many users who have been having problems or who have not been aware of the changes since 260.xx and again for 280.xx who have improperly managed their Nvidia driversets...  its required if they want to move past previous issues.

Ok, the Nvidia driver uninstall -and-  Nvidia driver install sections are 99% completed, just the last section is left....
 
Should have that done tonight, I'm off to bed

So should we put that setting back to where it was at stock? And just leave the other settings alone from BC2? Imo. The settings changed for BC2 are minor which is a good thing. Keeps things simple. But does it have an effect on lots of other games?
 
Yep, right there on top... stupid Maniac had you force a value (AF=x16 in the Control Panel), that right here in the Release Notes it says will cause problems!! when running the latest DX11 Crysis2 patch
--->(but only when using a 500 series card, not if your using a 400 series)... DOH!