Weird Windows Flicker Problem, Help!!!

[Developer2007]

I'm unsure if this is a hardware or software problem so I posted this here. I have just done a fresh install of windows7 x64 RTM (Erased my XP Partition completely) and installed all my applications.

Computer Specs.
Core2 Quad
9800GT
4GB DDR2 1066
Etc.

However I seem to be getting this flicker problem which makes it hard to navigate. It's a little hard to explain, basically if you have a window open you see the edge of the windows disappear for a millisecond but does this every second, so when you click on a file sometimes it doesn't select it and you have to click on the file again. Same goes for clicking the windows start button and other programs. It is really fustration and almost unusable (jumplists disappear within a second after being clicked).

All drivers are installed and I've installed the latest drivers from Nvidia website but no luck so far. Refresh rates and res are all correct also. I don't think it's a monitor issue as it shouldn't affect me clicking the file or start menu.

Has anyone experienced this issue? If so please help me solve this.