I am using Vista 64 SP2 on a 680i SLI chipset with driver 15.25. Video card is GTX 295. Currently I am on 182.50 driver version. When I install 186.18 over these drivers, they driver installs fine, but the control panel installation fails. The files for the control panel dont get copied over to the windows\system32 directory as a result old control panel from 182.50 remains and never works due to a version mismatch. On the other hand trying to install these drivers after uninstalling old ones -> rebooting in safe mode -> using driver sweeper -> rebooting back to normal mode and installing, still control panel files fail to get coped over and it fails installation. Driver works fine though. I have even tried reinstalling 186.18 over the above partially installed, yet no luck. I have even tried installing it under safe mode. Also i have downloaded the installer from 2-3 different sources using different browsers to ecluse any download corruption that might have happened. here is where I posted 1st, but no luck... http://www.evga.com/forums/tm.asp?m=100738283 I have also tried installing the control panel from its own installer that lies in the extracted out files for 186 series driver. I have also tried getting rid of all nvidia related drivers from system including chipset and installing, still no luck. Any suggestions how to fix this issue? One thing I havent yet tried is installing the 186.18 driver and then manully copying over the nvcpl*.* files manully into the system32 directory and using regsvr32 to register the dll. For this can someone here with this driver and same OS as me upload their files from the windows\system32. I think there are 2-4 related to the control panel. Thanks.