Sounds lik you got yourself a virus.....read here:
http://www.gnutellaforums.com/open-discussion-topics/41432-warning-viruses-network-you-should-aware.html

And if you can't get rid of it by yourself, go here and get (free) professional help:
http://norbiesworld.co.uk/computerhelp

__________________

"Never Argue With An Idiot. They Will Drag You Down To Their Level, Then Beat You With Experience"