Originally Posted by 6_pac

Mov files tend to be porn/spam. I stick with mpg and avi files.

It's probably a codec problem.

Apple - QuickTime - Technologies - H.264

Final Builds Site

For WMP, K-Litecode Codec Pack gets recommended a lot. I use XP Codec Pack 2.0.6 and rarely have any trouble playing a file. Though I don't d/load mov files so I don't know if these will help.

VLC should play it, it plays just about everything. The codecs are already built in: VLC media player.

More info here: CODECs list for Movies /Alternate players / Video help forums