I used System Restore to rollback a driver update on Win 7 pro x64 (not display driver).
When the system came back up, the resolution was less than it used to be. I went into both the Windows Screen Resolution dialog and the NVidia Control Panel and the correct resolution of 1440 x 900 is gone.
I went to my video card manuf. site and downloaded the latest driver for Win 7 pro x64 and it didn't help.