Portable Antivirus software can be run without the need for any installation. So they can be taken into the USB flash drives or CD/DVD Drives and run directly from there without even copying the files to the target computer. This can be useful if you want to clean infected computer with no Antivirus.
All the antivirus software listed below can be updated to include the latest signature. But the only problem with them is that they cannot be used for real time protection. They are only designed for the purpose of scanning the PC for malware and threats and then trying to clean the computer.
Please note that these antivirus software cannot be used as complete protection for your computer, since they assist professionals to clean infected computers only. This is because; they do not provide real time protection.
I am listing some of the Portable antivirus software which are free.
It is a popular Portable Antivirus. It is open-source application.
At first run it will require you to download signature updates.
After updating it can be used to clean your computer. It supports automatic updating of the virus database. It can also integrate into Windows Explorer shell so that you can easily scan a file or folder with a single click.
A free Tool provided by Kaspersky to clean an infected computer.
Kaspersky Virus Removal Tool 2011 is a free software used for removing viruses, Trojans, and spyware and other types of malware. Kaspersky Virus Removal Tool 2011 uses same algorithm as of Kaspersky Anti Virus for detecting malware threats. The utility can be used as a free on-demand antivirus software.
The program can be used to remove Trojans, Spyware, Adware, Worms, Dialers, Keyloggers and other malign programs. It also offers the option to quarantine infected files.
The program is available in two interfaces one is GUI based a-squared Free and other is command line based scanner.
The graphical interface gives you the option for scanning in different modes.
Stinger is a small and simple application for removing viruses, trojans from an infected computer. The scanning is based on next-generation scan engine technology.
The stinger can detect some specific viruses. It detects and removes threats as listed in the “List Viruses” in the Stinger application.