Everytime when i boot the system i receive the message in AVG. "Threat Detected While opening file:C:\WINDOWS\System32\mmc.exe Trojan Horse BackDoor.Generic3.YHC" This started right from when i opened a MS Word document in internet. I tried healing and moving it to the vault as suggested by AVG.But the thing happens is just the Trojan Horse adds up in the vault and it again appears when i boot the system. I also experience another problem where a folder reappears when i delete it permanently by pressing Shift+Del in a particular Drive. Please Help.

Disable System Restore before attempting to get rid of the trojan. Life is more painless for those who are brainless.

After trying to disable the system restore option i found that no system restore points are shown other than the one in the current month i.e. June and i'm sure that i had two restore points last month and i never deleted those or even disabled the option before.Is it because of that trojan???.

I couldn't find the effect of this trojan since it is not available in any of the virus encyclopedia(s) i searched...

And is it safe to delete that file mmc.exe which is affected by that trojan horse since i read somewhere that removing the file affected removes the trojan but i suspect that it is a system file.Help.

I advise you to try Spyware Doctor. FREE download here: http://www.downloadatoz.com/trojan-...

It is quite normal for mmc.exe to be located in c:\windows\system32 Unless this has been replaced by a "nasty" then it should be safe enough. Type sfc /scannow in the Run box, which will replace any original system files that are corrupted. DerekW