Hi Jade3kids,
Inside the movie folder you downloaded, there should be a file or files as a single movie clip or video clip Icon, it should say AVI or MPEG this should be your movie. Sometimes in the "downloaded" folder, there are other things such as MP3 or shortcuts from the torrent or torrent tracker.
But all video clips should all have sound and "video" together on the files.
If there is no "single clip" or "video clip Icon" that has a AVI or MPEG on it in your folder, something is wrong you might try again maybe with another torrent source.
We can not condone here at the Forum the use of copyrighted material and "many" files that are movies do have bugs in them, as "Billyfridge" indicated you should use a anti virus program to check "all" downloaded files prior to opening them.
I hope this help you, Happy Hunting !!
Fuzzy