Strange videos

[burak]

after i installed some softwares, the videos in my pc dont work well, their colors are strange, like negatives of photos. i tried to fix it by installing new codecs and programs etc. first it worked, but now it doesnt work again.
any ideas? (downloading codecs, links etc.)

btw i'm new at tsg, regards to anybody.

 

[lister]

My first thought, would be to uninstall the software you added since the problem first appeared.