Just had a friend on the line, “I think I have a virus..”..  in this day in age even if you have a decent antivirus installed, is no guarantee for an infection-free existence.

Anyhow, my suggestion to him was; try some or all of these online scanners (its free and besides the time it takes to scan it’s fairly painless), actually for the rest of us it’s a decent idea to sometimes get a second opinion (from our installed antivirus) even if we think everything is fine.

So get scanning;
http://onecare.live.com/site/en-US/center/howsafe.htm?s_cid=mscom_msrt
or http://onecare.live.com/

http://www.bitdefender.com/scan8/ie.html

http://housecall.trendmicro.com/

http://www.kaspersky.com/virusscanner

http://support.f-secure.com/enu/home/ols.shtml

http://www.eset.com/onlinescan/

http://security.symantec.com/sscv6/default.asp?langid=ie&venid=sym

http://home.mcafee.com/Downloads/FreeScanDownload.aspx
(or goto McAfee and search for McAfee Free Scan)

A collection of various utilities (page is in Danish, but links to international sites)
http://www.spywarefri.dk/onlinevark.htm

If you are about to give up, then there is one final hope – McAfee offers an online service where they will assist you in removing your infection for US$ 89,- and if the sh.. really hits the fan, then $89 may not be that bad a deal).

http://us.mcafee.com/root/landingpages/afflandpage.asp?affid=0&lpname=12982&cid=45687