Best Portable Antivirus.

Most if not all portable antivirus programs don't have real-time scanning, though.

If I need a one time scan, I just use an online scanner. Eset or f-secure.

Eset

Seen as you asked specifically for a portable AV to cure other peoples PC of nasties, You could try a very powerfull free commanline AV called a2cmd, I've tried and tested it for nearly a year with great results,you can have it just check and NOT remove the nasties so you can look at the log and show your family or customers the viruses/trojans thats on the PC, or you can have it encrypt and quarantine the nasties, Its up to you. http://www.emsisoft.com/en/software/cmd/ If you want to use it without having to type the cammands in,you can run a script with all the cammands in to make it easy for you,1 script for quarantine 1 script for scanning and logging etc or you can mix and match to suit the situation like a quick scan or a indepth scan that can take many hrs

Quote from that link:

Quote:

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For system administrators, security experts, and experienced commandline users. Check your system for malware infection with the Commandline Scanner. It includes all functions of the Anti-Malware scanner and both the top scan engines (Emsisoft Anti-Malware and Ikarus Antivirus).

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I didn't even know those two engines existed. Nice find.

you can get the latest eset smart security 4.0 portable, even updates and take it where you want, also i have a disc with 7 major anti virus programs for scanning. spybot would be the most efective and for that to be portable just copy the program files to a thumb drive and go, works great !

Glad i could help,hope they do the trick for you to keep those pesky trojans at bay

i think NOD32 is the best in my opinion

I onl use NOD32

avira