Terrible flashing problem

[Fish Steel]

Many times when I go onto Nexiuz, the screen starts flashing wildly. Other times when I go into nexiuz it runs smoothly until a map change. Then it starts flashing wildly again. I hope this is enough information. It usually flashes the last screen, and that is usually the console. On a map change it is always a console. It doesn't stop flashing unless I restart Nexius. I am a Windows XP user, and I have a pretty up to date graphics card. I am also not very good with computers, so please explain my problem using simple words.

[mand1nga]

I bet you have an Intel video card. If is that the case you can see this post

If you just can't see this menu (like me, because some weird Dell restriction) you have two workarounds 1) Press windows key + D twice or 2) Open the console and type vid_restart (this is slower)