hmm sounds like the Hack'a'Tack trojan try these links

http://www.iss.net/security_center/static/2325.php

http://www.symantec.com/avcenter/ven....critical.html

also google is you're friend also try you're AV software vendors website

http://www.google.com/search?hl=en&l...2Expl32.exe%22