How to Fix Zero Access Rootkit Virus
Symptoms: 1) Disables Microsoft security essentials 2) wont let you download any *.exe (virus was found and deleted error) so neither remote session or teamviewer would work
Enable remote desktop on client computer and remote in from the server.
Login to the machine
Clean out temporary files using tempcleaner
Run Malwarebytes anti malware – It will detect few Trojans (quick scan is good enough). You can run full scan if you have loads of time.
Run ComboFix: combofix does the magic and removes the virus. In some instance combofix needs to run multiple time. But in most instance it will remove it in the first instance.
Reboot your computer
Now let’s remove left over traces
Download and run “RogueKiller” click on scan and hit on delete. May have to do couple of times to actually delete detected items
Now some housekeeping
1. Uninstall combofix : combofix /uninstall
2. Enable security essentials: enable “Microsoft antimalware” service and update security essentials
3. check firewall: sometime they would mess up firewall
4. disable unnecessary startup items and disable java for browsers (unless they really need it)
As a precaution if you have time on your hand you can run 1) Malware bytes anti rootkit 2) tdskiller 3)HitmanPro