display problems

All of a sudden my display shows these horizontal lines whenever a window is open and the text is hard to look at.
There are no horizontal lines when a screensaver is on, or when a game is on (ie starcraft), even when it's booting the display looks fine. It's when windows actually starts (when the cursor is available to move) that the horizontal lines appear.
Please help me fix this problem.
I think a reinstall of windows will solve this but I really don't want to backup everything again.

Thanks in advance.

Have you tried uninstalling and reinstalling your display drivers?

How would I go about doing that?

Go to device manager and your graphics card will be under the "display adapter".Go to the driver tab and clcik on the uninstall button. just make sure you have the right driver to reinstall after rebooting.

Thanks for the tip, but nope it didn't work.
I tried to attach a screen shot of how it looks but the file exceeded 100 KB.
Any other ideas?

What video card do you have and what respolution is your display set at?

It's an NVIDIA RIVA TNT2 Model 64/Model 64 Pro.
I have the resolution set to 1280 by 1024 but I've tried changing it and same problem.

I've tried using a different monitor and still same problem.
Maybe it's the video card?
The first monitor this happened now died it did some weird stuff after the lines and now it's dead... lol
But now with this monitor also, anyone know what's going on?