Rizone Virus Cleaner: ViruClean
Rizone Virus Cleaner is a Freeware Portable Virus & Malware Scanner + Cleaner. It can be used to help detect and remove threats that may have been missed by your current Antivirus or Antimalware solution.
antivirus software
AVG Rescue CD Anti-Virus USB
AVG Rescue CD (for USB Sticks) is a portable version of AVG Anti-Virus supplied through Linux distribution. Created by AVG, the USB flash drive version offers a stand alone bootable AntiVirus, AntiSpyware, and System Recovery Solution. The AVG Rescue USB enables you to scan for and fully remove infections.
Kaspersky Virus Removal Tool
Kaspersky Virus Removal Tool is a free stand alone antivirus toolkit. Although it does not provide real time protection from viruses and can not stop a threat from entering your system, it can be used scan for, disinfect, and remove existing viruses or infections that may currently reside on your PC.
Avast Virus Cleaner and Worm Removal Tool
Avast Virus Cleaner was a Fee virus and worm removal tool that could even be installed to and launched directly from a portable USB device. It was a nice tool to have available for those extreme situations when you encounter an already infected computer. For many common infections a virus or worm can be removed quite easily using this Portable Antivirus tool.
ClamWin Portable Antivirus Software
No computer should be without antivirus protection, and when you’re on the move, a portable antivirus solution becomes essential. ClamWin Portable offers just that, a free, open source antivirus scanning that can be carried on a USB stick and run without installation. Ideal for scanning infected or suspicious computers, it provides on demand virus detection based on the popular ClamAV engine.