Watching videos
 

When I try to watch the movie this comes up

Windows Media Player cannot play the file. The Player might not support the file type or might not support the codec that was used to compress the file.

please help :S!

Did you check the Stickies at the top of the forum sections like the forum rules (which you read when signing up to the forums) say you should do or search the forums before posting?
CODECs list for Movies/Audio/ Alternate players / Video help forums/ video-mp3 fixers
You could have found that for yourself if you had been bothered. The info is already on the forums but you are just too lazy to find it for yourself. ALL forums have RULES & all members are expected to read them; Forum Rules (click here)