It sounds like you have a virus
http://www.gnutellaforums.com/showth...threadid=39612
Check out point 4 here
http://www.gnutellaforums.com/showth...threadid=41432
This last thread has lots of info about virus probs & how to avoid them. Make sure you have a good AV program & scan a file before you open it. There's also a link to norbiesworld, if you go & register on his site, he'll help you get rid of the virus.