I'd suggest downloading a codec pack, and overwiting the current ones. Better yet find out what codec it uses (should be in 'properties' of the file) and reload only that codec.
I use the 'Nimo' codec pack. Search for it on Google.
I know what this is. this happened to me...except mine was more vibrant...looked like i'd been smoking weed...which, I hadn't. *coughs*. Anyhoo, I reccomend going to nVidia's site, and finding the media playback (somethin like that) installer...fixed my probs. hope I helped.
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