Sonya, sorry to here that. Can you tell us what kind of files these are. I'm just thinking they
may be fake files. If they are video files then you can use Bitzi to check them before you download. See Links below for more info.
Look up the files with
Bitzi before downloading to help sort out the bad ones.
See:
Recognising Fake files
And for tips on finding good files, see:
How to find music.
Hope this helps.