windows media error code on vista....

[topps999]

MY SPEC TO START...

AMD anthlon 64 2x dual core 2.4, 4800
Xpertvision 8800gts 320mb
550W psu
M2n-E Sli motherboard
18x CD-DVD Re-Writable
3/4 floppy disc
2x hard drives =380gb
wirlesss ASUS WLAN card / ethernet cable
soundblaster live 5.1
2.5gb of RAM
VISTA ULTIMATE 32BIT

MY PROBLEM...

i have vista ultimate 32bit, and i keep getting the error code when i try and start windows media player, it only started orrucring when i tried to play a movie which i downloaded, this is the code...

http://img520.imageshack.us/img520/7565/errorrv2.jpg

IF U NEED MORE INFORMATION ABOUT MY HARDWARE SOFTWARE ECT PLEASE DONT HESITATE TO ASK THANKS

 

[Osiris]

what format is the video in?