Sometime you try to open Windows Task Manager, the following error message appear: “Task Manager has been disabled by your administrator”.? This could happen due to change in registry setting by some unauthorized program or Trojan.? You may also be restricted or block to use Task Manager by changing “Local Group Policy” or “Domain Group Policy”.


Follow these step to resolve the issue.

  • Go to “Start” -> “Run” -> Write “Gpedit.msc” and press on “Enter” button.
  • Navigate to “User Configuration” -> “Administrative Templates” -> “System” -> “Ctrl+Alt+Del Options”
  • In the right side of the screen verity that “Remove Task Manager”” option set to “Disable” or “Not Configured”.
  • Close “Gpedit.msc” MMC.
  • Go to “Start” -> “Run” -> Write “gpupdate /force” and press on “Enter” button.

Registry Setting Change

Note: Backup your registry before doing any change. Changing registry can cause serious problem and unstable your computer.

Go to “Start” -> “Run” -> Write “regedit” and press on “Enter” button.

Navigate to the following registry keys and verity that following settings set to default:

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System] “DisableTaskMgr”=dword:00000000

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Group Policy Objects\LocalUser\Software\Microsoft\Windows\CurrentVersion\Policies\System] “DisableTaskMgr”=dword:00000000

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system\] “DisableTaskMgr”=dword:00000000

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] “DisableCAD”=dword:00000000

Reboot your computer.

Written by Bala Krishna

Bala Krishna is web developer and occasional blogger from Bhopal, MP, India. He like to share idea, issue he face while working with the code.

This article has 6 comments

  1. Jim Paul

    These steps worked! I didn’t have to change all the registry keys named, but the few I did corrected the problem! Thanks for the information!

  2. Gas Detector :

    registry cleaners are really very useful specially if you are encountering registry errors on your windows xp machine _