Apparently ESET (NOD32 Antivirus, ESET Smart Security) recently released an update to their virus definition database (db 6799) that wrongfully detects the malware JS/Redirector.B in Adblock Plus installations using the EasyList filter subscription.
ESET has already confirmed and fixed this false positive, so all you need to do to fix the problem is to ignore the warning and update your virus signature database (db version 6800 contains the fix).
If you have already removed the files, restore them from ESET's Quarantine (is that possible?) to restore your filter rules. If that is not possible because the files have been completely removed, make sure to at least re-subscribe to a filter list: https://adblockplus.org/en/subscriptions
If you had any custom filters and no manual backup of them, they might be lost now.
I have moved and locked all other threads regarding this issue to keep the forums tidy, but feel free to take a look at them and if you want to comment, please do so in this topic.
Other related topics:
http://forums.overclockers.co.uk/showth ... t=18364004