Working on a machine pretty well crippled by Vundo trojan. Eradicated most if not all manifestations with various AV programs, including MalwareBytes and HijackThis. Restored access to Registry OK. Still cannot get Automatic Updates to work or even install updates by going to MS website, because BITS service is stopped and cannot be started because of missing file. Attempts to install SP3 from MS-TechNet disk look good up until the end when it just displays an "Access is Denied) window and backs out of the install. Tried a repair by reinstalling SP2, with same result - Access denied. Have attempted restore with OEM's install disk (Microcenter), but that doesn't restore the crippled functionality. Running a SFC now against an XP-Home Upgrade CD and that might help; don't know yet.
Question: The missing BITS (Background Intelligent Transfer System) file might be key; but what is it and where would I get it if SFC doesn't do the job?
Any other help with this really nasty Trojan would be much appreciated.
Ron Hicks, Arlington VA