best antivirus / scanner / antimalware for OFFLINE machine? something portable / runs from USB?

giantbucket

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Nov 17, 2013
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i have a number of OFFLINE machines, running anything from 98SE to 8.1, and i am looking for an antivirus as well as anti-malware that i can use WITHOUT an internet connection. so, ideally something i can run from a portable USB stick so that i don't even have to install it, but i guess install is ok if absolutely necessary.

i guess i'd need to manually get a definition update once a month or so, which means i'd want something that can handle having updates done via USB / offline.

i'll likely use Malwarebytes for mal stuff. but for viruses, i've no idea what to use.

suggestions? um, free is preferred but i could be ok paying a few bucks for a portable run-from-USB version that can handle all of my systems.
 
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