When I close my Firefox browser, Avast Home warns about this being a Trojan. The path ends in _cache3_ in a Firefox location on my C drive. If needed, I’ll have to wait for the warning to happen again, and I’ll write it down.
I have repeatedly clicked “delete”, but it re-appears from time to time - there is no pattern.
I have tried running a full scan in each of Avast, Adaware, Spy Doctor, Malwarebytes’ Anti-Malware, and Spybot (all free versions).
How do I go about getting rid of this problem permanently? I’ve searched “JS:FakeCodec-G [Trj]” on Google, Bing, and this web forum, but I get no hits.
Schedule a boot time scanning with avast with archive scanning turned on. If avast does not detect it, you can try DrWeb CureIT! instead.
Use MBAM (or SUPERantispyware or even Spyware Terminator) to scan for spywares and trojans. If any infection is detected, better and safer is send the file to Quarantine than to simple delete them.