Portable Free Apps : Use it And Enjoy it

If you don’t want to pay more money and keep your PC safe, you can try ClamWin. ClamWin is a Free Antivirus program for Microsoft Windows 98/Me/2000/XP/2003 and Vista.
ClamWin Free Antivirus comes with an easy installer and open source code. You may download and use it absolutely free of charge. It features:
* High detection rates for viruses and spyware;
* Scanning Scheduler;
* Automatic downloads of regularly updated Virus Database.
* Standalone virus scanner and right-click menu integration to Microsoft Windows Explorer;
* Addin to Microsoft Outlook to remove virus-infected attachments automatically.

Simple Machine Protect is portable antivirus software for your Windows Operating System, build to remove certain variant of virus, worm, trojan and spyware from your computer. SMP was designed to be a simple, open source antivirus.