If your taskmanger has been disabled due to some virus attack - here’s a simple trick to re-enable your taskmanager.

1) Goto to “Start -> Run…”

2) Type gpedit.msc and hit enter.

This will open the “Group Policy Object Editor” Window which stores the Computer and Current User Settings.

3) On the left part you would see a tree navigation.
Navigate to “Local Computer Policy -> User Configuration ->Admisitrative Templates -> System -> Ctrl+Alt+Del Options”

4) Under “Ctrl+Alt+Del Options” double click “Remove Task Manager”.

Then click on the “disabled” radio button. Now click “Ok” to finish.

5) We’r now done. Press Ctrl+Alt+Del to see your task manager back in action.