You have a Trojan! I found the following info at "securityresponse.symantec.com".
Bloodhound.Exploit.56 is designed to identify behavior that would occur if the Microsoft Windows Graphics Rendering Engine WMF Format Unspecified Code Execution Vulnerability (as described in Microsoft Security Bulletin MS06-001) is exploited. As Symantec becomes aware of changes to the exploit code, or if files are identified that trigger this detection but are not malicious, the detection is refined. It is important to keep your definitions up to date to ensure the most complete protection.
Please follow the instructions at this link: http://www.bleepingcomputer.com/forums/t/25912/unzip-hijackthismake-a-shortcut/
Be sure to post your HJT Log in the "HijackThis Logs and Analysis" and not as a reply to this.
Someone will read your log and reply with instructions on how to remove/fix your problems. Be patient please, the amount of requests for help here at BC is a bit overwhelming and you may not get a response for a few days.