There are a lot of fake files put on the network to try to dissuade people from d/ling. The newer and more popular the file is the greater chance that there will be fake files being shared. Also some people don't check the files they d/l and are sharing bad files.
When you choose a file to d/l. Try one that doesn't have a lot of sources and has a cable/dsl speed instead of a T3 connection, but sometimes it's a matter of trial and error. Usually persistance will pay off.
You could try looking up the file with Bitzi. See
How to use Bitzi Web Lookup .. & How to use Magnet Links & Direct Connect/Browse/Chat.
Also read the stickies. This one has a lot of info
Major Topics for Upload/Download Help.