How to enable and disable Task Manager in windows?

Task Manager may be disabled in your computer due to virus or intentionally disabled.

If you try to open Task Manager, it may show message like "Task Manager has been disabled by Administrator". You can enable or disable Task Manager by two methods.

Group Policy Editor

Go to Start -> Run

Type gpedit.msc and press Enter.

In the left pane of new window opened, navigate to User Configuration -> Administrative Templates -> System -> Ctrl+Alt+Del Option.Then, in the right pane, double click Remove Task Manager.Set its state to Not Configured to enable Task Manager and Enabled to disable Task Manager

Registry Editor

Go to Start -> Run

Type Regedit and press Enter.

Navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System

In the right pane, add new DWORD value with name DisableTaskMgr and set its value to 1, to disable Task Manager.

Similarly, if you want to enable Task Manager just delete the value with name DisableTaskMgr.