Online Scanners (and a few other tools)

If the pc works enough that the unit can be connected tot he internet, consider the following:

      (Note, have tried to eliminate ones which only scan and then want a fee for cleaning).

F-Secure (quick)
https://www.f-secure.com/en_US/web/home_us/online-scanner

Eset
http://www.eset.com/us/online-scanner/

Kaspersky (scan only)
http://usa.kaspersky.com/downloads/free-anti-virus-scan

Kaspersky Rescue Disk, and other Tools
http://www.kaspersky.com/virus-scanner

Kaspersky Malware-Specific Tools
http://support.kaspersky.com/viruses/utility

Panda (has offline file as well)
http://www.pandasecurity.com/usa/homeusers/support/tools.htm

Emerisoft (huge download, 154MB)
http://www.emsisoft.com/en/software/eek/

Norton (huge download, aggressive selling, but fairly thorough)
https://security.symantec.com/nss/getnss.aspx?langid=ie&venid=sym

Bit Defender
http://www.bitdefender.com/scanner/online/free.html

Housecall (is slow, like hours, and can hang)
http://housecall.trendmicro.com/

Bullguard also has one.