1. To disable task manager click on “Start” and then open “Run” Box.
  2. Write “regedit” and than press enter. This will open registry editing settings.
  3. Now go at the following path —
    HKEY_CURRENT_MACHINESoftwareMicrosoftWindows CurrentVersionPoliciesSystem”
  4. Right click at empty area and then select New-> DWord value. write the name for eg. DisableTaskManager
  5. Now right click on this DWord value and select Modify & Set its value to 0 for enable the task manager and 1 for disable the task manager.