No codec?

[rptx]

I've installed lot of codecs, and whenever I load a movie in WMP6.4 and click on properties, it never saids I have any codec installed. Is there any known problem similiar to mine? Also, I cant watch any .avi movies, so I use VirtualDub to watch them, and for some avi's, it tells me "Couldnt locate decompressor for format "MP42" It requires a VFW compatible codec?

Any help is appreciated. Thanks.

-rptx