Take the 2-minute tour ×  Despite running the latest Service
packed versions of Windows 8 with UAC, Windows defender,
Microsoft Security Essentials along with Firefox 6 + updates, my
computer became infected with a Trojan from a website which made
nearly all the files on the HDD Hidden. Then Ads kept popping up
for a fake AV application.  I have a removed the Trojan (I
think) but my Firefox browser search has been hijacked. I have
disabled all addons, ran Hijack this, Malware Bytes, the USB
linux based AVG scanners and several commercial online viruses
scanners which find nothing. How can I track down and remove the
hijacker which I think was installed by FakeSysDef?
share|improve this question FAQ: superuser.com/q/100360/52492.
–  RedGrittyBrick Nov 9 '11 at 23:13 Thanks Ive tried most of
those suggestions on there already. Im fairly sure the malware
is gone from my PC but whatever is causing the search re-directs
still remains. A re-install of the OS is looking likely. – 
Canacourse Nov 10 '11 at 11:26 add