SUMMARY
The following knowledgebase will help you to resolve the error message "Task Manager has been disabled by your administrator" when you try to use "Task Manager"
SYMPTOMS
When you try to open Windows Task Manger, the following error may appear: "Task Manager has been disabled by your administrator".
CAUSE
There following
1. You use account that was blocked via the "Local Group Policy" or "Domain Group Policy".
2. Some registry settings block you from using "Task Manager".
1. You use account that was blocked via the "Local Group Policy" or "Domain Group Policy".
2. Some registry settings block you from using "Task Manager".
1. Verity that the "Local Group Policy" or "Domain Group Policy" doesn’t block you from using
"Task Manager".
1.1 "Local Group Policy"
a. Go to "Start" -> "Run" -> Write "Gpedit.msc" and press on "Enter" button.
b. Navigate to "User Configuration" -> "Administrative Templates" -> "System" -> "Ctrl+Alt+Del Options"
c. In the right side of the screen verity that "Remove Task Manager"" option set to "Disable" or "Not Configured".
d. Close "Gpedit.msc" MMC.
e. Go to "Start" -> "Run" -> Write "gpupdate /force" and press on "Enter" button.
Note: If you are using Windows 2000, please follow KB q227302 instead stage "e".
Using SECEDIT to Force a Group Policy Refresh Immediately
http://support.microsoft.com/kb/q227302/
1.2 "Domain Group Policy"
a. Contact you local IT support team.
2. Verity correct registry settings::
a. Go to "Start" -> "Run" -> Write "regedit" and press on "Enter" button.
Warning: Modifying your registry can cause serious problems that may require you to reinstall your operating system.
Always backup your files before doing this registry hack.
b. 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
c. Reboot the computer.
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