Messed Up Video

[TheJoonSpirit]

My screen seems to be messed up. In any applications I run, there are always yellow streaks, squares, and other designs on the screen. Like when I'm running WinWord and I scroll up and down, yellow streaks appear in the text and along the margin. It goes away if i minimize and then maximize the window. I don't think it's my monitor since I can clear the markings by minimizing/maximizing. Any idea?

 

[NuroMancer]

List specs, including moniter resolutions etc.

 

[TheJoonSpirit]

Monitor:
Gateway EVO700 (it's old but it was free)
1024 x 768 at 32 bit

Graphics Card:
ATI Radeon 9700 Pro

CPU:
AMD Athlon XP 2500

MB:
DFI LanParty