rjohnson11
Oh and by the way the update replaced the NVIDIA drivers with the Microsoft NVIDIA video drivers so you have to reinstall the NVIDIA drivers.

I D/L'd and installed the new preview build.  Sure takes awhile (~30 min) for these updates.  I checked my graphics driver after the install completed.  No change there.  My drivers were the same as what I had previously. (344.48)
 
So I guess it pays to check first since it sounds like it can go either way...

guys on the second build it lets you close the store and you can get sli it work for me but to open the nvidia control panel you must first turn off nvxdsync.exe

Had More problems with build 9879 than I had with build 9860, Specifically concerning loading Futuremark Benching software and other associated programs (i.e., CPU-Z, HWMonitor, Precision X 4.2.1 and others).
 
Just thought I would try Windows 10 evaluation builds 9841, 9860 and 9879 JUST to see if they made any kind of difference in Benching Scores/Gaming, But this software has been more buggy/troublesome than I thought! (Yeah, I Know it's only an Evaluation version. )  

If you have programs which aren't working properly you might need to uninstall and reinstall them. 

I just went back to 8.1, due to constant bugs with gaming. Mainly, Shadowplay wouldn't work most of the time (red line through the on-screen icon), and either of the newest drivers caused massive hangs when starting up games. This was on all the builds (including 9860 and 9871). If I tried to load GeForce experience, nothing happened. Only a reboot fixed the issue, but only for a while.
 
I tried nuking everything and installing fresh from the ISO yesterday, but I still had the same problems. So today I restored my system image from 10/7 (which I had made right before upgrading).
 
I'll probably load it in a VM just to play around some more. When the consumer preview comes out I'll try again on my gaming desktop.

Good article there. Many of the articles on this topic were along the lines of, "ZOMG Micro$uck is keyloggerz, and all your passwords are belong to Russia."
 
It's also worth noting that any search text box (like on Google's home page) where it auto-suggests web sites, is also technically a key logger. They receive every letter that you type, and the suggestions change based on each key pressed. But most people don't think about this part of it.

Had some problems with build 9879 so I'll not try again any Evaluation builds.

rjohnson11
Using 9879 with no problems whatsoever. Very stable working environment.

+1 all smooth sailing here too. I'm not getting really crazy with it though since it's just an evaluation copy. Getting used to the set up and where things are (Never installed or used Win 8) I did run the Heaven and Valley benchmarks with it, nothing really extreme in differences....Win 10 does beat Win 7 score wise in both, frame rate wise they are pretty much the same.