Enable Task Manager

My Windows 2000 Professional attacked by virus Brontox Bro, so the Task Manager was disabled. To enable it, I edit the registry entry like the following:

Registry Key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
Modify/Create the Value Data Type(s) and Value Name(s) as detailed below:
Data Type: DWORD Value // Value Name: DisableTaskMgr
Setting for Value Data: [0 = Enabled (Default) / 1 = Disabled]
Exit Registry and Reboot

If you face the same problem, I hope this will help you.