avast! Virus Cleaner 

avast! Virus Cleaner is a free tool that will completely remove selected viruses & worms from PC: Badtrans, Beagle, Blaster, BugBear, Ganda, Klez, MiMail, MyDoom, Nachi, NetSky, Nimda, Opas, Scold, Sircam, Sober, Sobig, Swen, Yaha, incl. variants.
virus clean cleaner virus cleaner remove virus disinfect virus killer kill repair virus repair

noHTML for Outlook Express 

noHTML for Outlook Express adds a button to Outlook Express, and with a single click you can enable or disable HTML in your incoming email. It lets you read your emails more quickly, and eliminates the danger posed by most email-borne attacks.
outlook express antivirus security mail add-on plug-in disable html webbug web-bug extension

GFI MailSecurity for Exchange/SMTP 

GFI MailSecurity for Exchange/SMTP is an email content checking, exploit detection, threats analysis and anti-virus solution that removes all types of email-borne threats before they can affect an organization?s email users.
antivirus exchange server microsoft exchange windows 2000 security nimda email security security software exploit klez