Recently I upgraded my computer from Vista Home to Windows 7 pro. Now all of my games worked with windows vista, all sudden after upgrade only few works now such as NFS: undercover, Cities XL 2011. but not others like Guild wars, Fallout New vegas, they keep crashing whenever I open them.
So, I decided to update my drivers. my current drivers are 126.96.36.19996 & updated to latest 260.99. after the update all my applications started crashing mainly showing nvd3dum.dll is the cause. & it disabled my Direct3D acceleration.
Just to be sure I ran Memtest & it passed.
any suggestion is welcome
Also, I'm running dual monitors on this computer.