mode change/monitor "degauss" effect after installing nvidia drivers

Ive just installed the same nvidia gforce download file on 2 different pcs
after complete pc rebuilds.
One is running a gforce3 on XP, the other a gforce 4 ti600
Whenever I right click on the tray icon, or attempt to change a setting in
the video properties window, the monitor appears to attmept to change video
mode or degauss (sorry, Ive no idea how you spell that word) the monitor. A
definate click is heard in the monitor.
I never had this problem before installing this software, and their site is
the only source for my drivers.
Has anyone else had the problem?