Video and game play problem

T

This is the configuration of my rig...
AMD Athlon 64 3200+
MSI K8N Platinum Motherboard
Transcend 2*512mb
XFX Geforce 6600 graphics card...
Western Digital 80 GB SATA HDD
i also have a server grade power supply so i know it isnt a power problem...
I have Windows XP Professional Installed... Service Pack 2 pre-installed.
i have DirectX 9.0c installed...
Now the thing is that i used Xp home edition temporarily and everything worked fine there..Here the problem is back.
everything else works fine...but when i play video,after a few seconds the monitor switches off and the sound plays on a loop..i have no other choice but to restart...this is very annoying..strangely, i can play games like moto gp2 without any problems...but when i try games like tachyon or freespace 2, it hangs immediately. Same goes for any video i play in any software.
My monitor is working at a refresh rate of 60Hz which the nvidia software itself selected. Please help me out with this..this is getting on my nerves...
Thanks in advance.

I

no warez allowed here - mehul

S

no illegal site's url allowed here - mehul

T

what are you talking about?

what software are you using to view your video?

T

vlc media player. and windows media player. But the problem is not only with videos. Even games dont work and the fact is that i have a pretty decent configuration I tried playing World of Warcraft and it hangs......can you help?