Use Bitzi to check files before download If users have rated the file, you'll get an idea of it's quality & content....useful for finding out about misnamed or infected files.
How to use Bitzi Web Lookup .. & How to use Magnet Links & Direct Connect/Browse/Chat

Check out this thread for advice about deleting files. I've used Unlocker & DelinvFile, they've both worked well
http://www.gnutellaforums.com/downlo...elete-all.html