What codec am I missing?

[DEL 707]

I've had this problem for awhile but never bothered to fix it because I don't really watch any video/movie files on this machine, but right now I have ton holiday films I'd like to watch but can't.

When ever I play a movie, the picture is VERY dark and only displays in red, some also don't have sound. I've downloaded quicktime player and the latest Divx but it doesn't solve anything.

 

[DEL 707]

Just tried VLC, sound but no picture

 

[DEL 707]

I'm using a 7800 GTX with the latest Nvidia drivers, ForceWare Release 169.21. Just to be sure I downloaded and reinstalled. OS is WinXP Pro.

I've uninstalled all codecs and tried FFDshow and done the same with cccp, however the results are always the same, just a dark red picture.