Quoting csimon
Is anyone going to give the beta 195.xx drivers a try?
I tried in Win7-x64 with GTX 260-216@725/1450/1200. Just like the previous 19x drivers, Fallout 3 still stutters, Crysis benchmark is still 5% slower. I am back to 186.18 again. But going back was proplematic. After uninstalling the beta drivers, rebooting and reinstalling the 186.18 driver, I started to receive the error message "Error in NVCPL.DLL Missing EntryNvStartupFirstRunAfterInstUserAccount". Obviously, Windows was keeping an incompatible DLL and mixing with the older driver. It has to be smart and helping, you know.
I have uninstalled 186.18, rebooted into Safe mode, used DriverSweeper 2.0.5 to clean everything Nvidia, and rebooted normally to install 186.18. This fixed the error. This is the third time I am going back to 186.18

Fourth time, this graphics card is sold.