nvidia 185.85 problem in win7

i have problem with driver 185.85 nvidia of my graphic card is 8600GT 512mb .. the problem is:
whenever I switch off the monitor and turn it back to last 2 minutes or
more gives me a BSOD error and the error that comes out that uses a dll
nvidia drivers have problems and automatically sends me to restart the
pc .... every time give me that problem
there any way to fix this problem??? .... My
version of Windows 7 Rc 7100 and my monitor is LG 32LG30R, Mainboard ecs nforce4m-a, Amd x2 5600+, 8GB Ram ddr2 800mhz, nvidia 8600GT 512MB, Hard drive 500gb sata samsung, dvd-ram lg super multi 16x.

I had some problems myself, though mainly general slowdown. Just went to device manager and said to roll back to prior -- the 181.72 which are the last available directly via MS/Windows Update.

They seem faster and without issues for me at least.