MSUpdate/Protoride worm

Avast Free Antivirus / Premium Security
1

I am using Windows 98Se and Avast 4.7 Home Edition Build May2006 4.7.827. Avast correctly identified an infection of MSUpdate/Protoride worm, but failed to remove it. The error message said something like “error moving msupdate to chest - access denied” I eventually got rid of this worm manually by using MS-DOS prompt to delete the .exe file, and then editing the exefile\shell\open\command registry key to restore the default value “%1”%*

My question is: Why was Avast unable to clear this infection for me?

2

Unfortunatelly, with Windows 98 you couldn’t run avast at boot time.
Access denied means that the infection is active, some process was using that file.
This is a common procedure of viruses to avoid cleaning.
Anyway, maybe they could improve the cleaning process of this particular infection, specially the Registry cleaning one ::slight_smile: