Having antivirus software run from a USB drive is a good, good thing, particularly since the large size of antivirus definitions have made running a scan from a floppy a thing of the past.
Moreover, since not all antivirus products will run in Safe Mode and it's much easier to clean a system in Safe Mode, this poses a bit of a conundrum. Plus, today's malicious software often attacks the antivirus first, meaning that just when you need a scan the most, the antivirus installed on your PC just might be dead.
The obvious advantage of a USB-based antivirus is that you can easily update it simply by plugging it into any Internet-connected PC. A second huge plus is that the USB drive also functions as a storage device and USB drive can support a number of other useful applications as well.
- Easy to carry and use.
- Updating virus defenitions is very easy when compared with ordinary antiviruses.
- Some infection disables the Antiviruses first disables the Antivirus installed on a computer, but in the case of Portable Antiviruses, they are stand alone programs.
- Use less amount of RAM memory.
- Norman Malware Cleaner
- Sophos Anti RootKit
- Dr. Web CureIt
- VIPRE PC Rescue
- Kaspersky Virus Removal Tool
- Trend Micro SysClean
- Mx One
- A-Squared Emergency USB Stick