AVI and WMV wont play

[Hellbreather]

Heys guys, for once I stumped myself. I made a video and it was .avi format, when I went to play it in Windows Media Player and Real Player both times it told me I needed a license to play and the license was a pRon advertisement!!! I tried the same video in WMV format and once again the same thing happened.
The only formats it will play are MPG and MPEG formats.
Any way I can bloodly get it to play them in those two formats (avi and wmv) as it's really annoying me. I have done countless anti-virus and spyware checks trust me.
I'am using Windows Media Player 10 and the latest version of Real Player.

Any Ideas as I have stumped myself
btw I have already made videos before in the avi and wmv file format and they played in Windows Media Player before

 

[The_Other_One]

Sounds like an over protective flaw with the codec, possibly some virus. Have you tried an other codecs? Or maybe uninstalling WMP?

 

[Hellbreather]

It's okay now. I fixed it now. I just system restored and it started playing again

Cheers for the suggestion though