Recently my Windows 2000 was attacked by Windows AutoUpdate Trojan Horse; Norton Professional FireWall detected it but did not remove it successfully. Subsequently, the Windows 2000 crashed and rebooted randomly and it was quite difficult to startup. I am evaluating a copy TDS-3 and it also does not detect changes in C:\WINNT\system32\wuauclt.exe. Is there any way to detect this type of problem by TDS-3? BTW, my solution is at present: 1) Stopped C:\WINNT\system32\wuauclt.exe from ‘Task Manger’. Delete both C:\WINNT\system32\wuauclt.exe and C:\WINNT\system32\dllcache\wuauclt.exe. Search my disk for a clean copy at C:\WINNT\ServicePackFiles\i386 and copy it to the location at C:\WINNT\system32. 2) Change NoAutoUpdate = 1. [HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate\AU] "NoAutoUpdate"=dword:00000001 3) win xp pro: my computer/ propreties/ automatic update and uncheck ''keep my computer up to date''.