Hi,
 
same issue here with 2-Way SLI GTX 780 and driver 331.40 on Win8.1 Preview - I can enable AUX Display with Windows Display controls but it moves the Taskbar in the wrong position.
AUX Display is also broken for me with 331.40 on Win7 x64... But no crash or freeze when I enable it via NVCP...
 
It seems that it will need some time to get a working win 8.1 & driver combination,
 
Cheers

Good morning,
 
I can confirm that this is the first that we have heard of this problem. The forums thread was forwarded to our Product Management Team to try and recreate the issue and report it to Nvidia. I can confirm that Windows 8.1 was just recently moved out of a preview state and Nvidia is actively working on driver updates for this new operating system version. 
 
 

This is also occurring on my system.  I have a similar configuration with 2 EVGA 680's...everything is fine until the accessory monitor is accessed.  Any mouse click or move of an window to that screen and everything appears to freeze.  There is also a thread at geforce.com detailing the same issues.  Please let me know and I will be happy to post a directly link.  Thank you.

Thank you.  We are looking into this.

Very happy this is being looked into.  I was a bit surprised to even see such an issue when the 8.1 preview had been out for so long.  The odd thing is once you get used to work with 4 monitors, it's a bit of a pain to go back to 3 lol.  Yes...very spoiled...I know. ;)

frostbyghte
Very happy this is being looked into.  I was a bit surprised to even see such an issue when the 8.1 preview had been out for so long.  The odd thing is once you get used to work with 4 monitors, it's a bit of a pain to go back to 3 lol.  Yes...very spoiled...I know. ;)

Microsoft can add or change the final code as they see fit. Now that it is out and available all of the companies can take a look at it. Most OEM PC manufacturers  have had the final code for a while. I have no idea if NVIDIA was given final code or not. The important thing is that they are now aware of it and will investigate.

frostbyghte
Very happy this is being looked into.  I was a bit surprised to even see such an issue when the 8.1 preview had been out for so long.  The odd thing is once you get used to work with 4 monitors, it's a bit of a pain to go back to 3 lol.  Yes...very spoiled...I know. ;)

lol yes it is, I keep looking up at my 4th monitor but then I see that it's off and I get sad 

frostbyghte
I was able to duplicate this behavior as well if I use the Modern UI and attempt to split the screen several times.  Once I hit the 3rd application running, the system became unresponsive and just the mouse would move.  This is just a spanned display with the latest nvidia beta drivers with two 680gtx in SLI.
 
zerid...heck yes...it's driving me crazy.   With all the positive press I thought SURELY a bump from 8.0 to 8.1 cannot be a big deal...meh... :(

Unfortunately nothing is 100 percent, but hopefully a fix is coming soon as per manual's post earlier

Same deal here.... tri-sli titan.  All is ok until the aux display goes on.  At that point its a countdown to the freeze condition.  Mouse will keep working, nothing else responds.  No errors hit the event log, no BSOD, etc.
 
Really disappointing (and sort of amazing) that there is something in a dot release thats a significant enough change to cause this kind of error.  Looks like the "don't upgrade until the first service pack" adage *still* applies in 2013 and now even to dot releases! :)

I have 3 570's and a 470 in physics mode and when I load up Windows 8.1, one of the 570's says to plug the monitor back into the card whenever I try to enable surround.  I double checked just incase to see if my TV was still attached and its not.  3 Monitors no Aux Monitor 4 video cards only the 570's are connected and I can't enable Surround.  Without touching the hardware at all I can reboot go into the bios change drives to my windows 8 drive and boom it all works perfectly in full surround.  So for the heck of it I upgraded my Windows 8.0 to 8.1 and same issue 1 card always says to plug it back into a monitor.  When obviously this is not an actual issue with monitor plugs.  So I formated my old windows 8 that was at 8.1 and put 8 back and full surround became available once again.  What in the world is wrong with Windows 8.1?
I7 970
Asus Rampage Extreme III
24GB DDR3 1600
3 EVGA 570 Classified
1 Galaxy 470
OCZ Vertex 3 240, Crucial M4 128gb, 11TB of old spinning drives.
1 1000watt TX psu, 1 1200 watt TX psu for a combined total of 2200 watts of available power.
Multiple blu-ray drives/burners etc.
I even loaded Vista 64 to see if it would work and it did.  This is truly a sad day for Microsoft and Nvidia. (thx Evga for prodding Nvidia / MS to look into this)

I've noticed this appears to affect any Modern UI app.  If I work within the Modern UI for any length of time with my surround 2d setup, it will freeze up.

Still nothing on this issue?  Any solutions please?

nope no fix yet, still a 200 dollar paper weight at the moment

This afternoon I rolled back Windows 8.1 to its previous version 8.0. After putting in a few hours with surround and the accessory monitor, I can confidently say my PC does not freeze-up. It is unfortunate I had to revert to an earlier build of Windows (I was anticipating R8.1), but I would rather use a fourth monitor that I payed for, than not use it at all.

Howdy!
I've got two EVGA 770's and have same issue, of course.  Mostly just posting to subscribe to thread, thanks!