I'm using Windows Vista 32 bit Home Basic
A few weeks ago my computer became infected with what I believe was a rootkit virus. The Java logo appeared onscreen right after I opened a news site and I could hear my hard drive was very active. I had AVG Internet Security 2011 running and it was updated. AVG detected the intrusion, quarantined it but the computer was still infected. I rebooted in safe mode and did a full system scan with AVG and noticed many files were skipped because they were "locked". I tried scanning with TDSSKiller and Malwarebytes Anti Malware but both programs would abruptly close a few seconds after I started a scan. I rebooted in normal mode and tried scanning with TDSS Killer, Malwarebytes and AVG and all 3 programs would close a few seconds after I started a scan and none of them would update. I noticed the .exe files for Malwarebytes and TDSS had the icon from “User Accounts” in the control panel superimposed in the lower left-hand corner of their icons and I couldn’t rename or delete or move the .exe. Downloading new programs and renaming them didn’t help. I loaded my most recent restore point and reinstalled Malwarebytes and TDSS and they both worked and cleared a registry entry but nothing else. Windows update and AVG both would not update. I downloaded and installed AVG 2012 in place of 2011 and it works perfectly but I still cannot use Windows Update. Right after I click “Check for updates” it says “code 80096001”. I tried every method except method 7 and 11 here: http://support.microsoft.com/kb/822798. I believe there are still some residual effects of this virus preventing me from using Windows Update. Maybe it corrupted or removed a crucial file? Is there some way to uninstall and reinstall Windows Update since that seemed to work for my other programs? Sorry for the long story but I wanted to be thorough.