For a Free, Online anti-virus Scanning and Removal goto
http://housecall.antivirus.com/housecall/start_corp.asp chose your country and click on go, let the applets download then check all your hard drive letters and don't forget the check the
Auto Clean before you click on Scan.
For more information on virus scanners check
http://www.nai.com &
http://www.symantec.com You can also get
Swatit the Free trojan scanning utility - go to
http://www.lockdowncorp.com/bots/downloadswatit.html , download - install - UPDATE and make sure your mIRC is CLOSED before you run the scan