Vistal + Dual monitors Problem

[BrotherTobious]

Hi hope you can help me. Just installed Vista Ultimate, all working fine installed some games and when I ran them the 2nd screen did this.

Please click on link for image of problem

The other screen is working fine while this is happening. I went out and came back now the main monitor is doing while the 2nd one is displaying correctly.

Any help would be great.


System

AMD 64 X2 4600+
2 GB Ram
xfx 7900gt Extreme GFX
Xfi Creative Music


Thanks