When you try to open Task Manager, the following error may occur:

Task Manager has been disabled by your administrator

Solution

This error is caused if the DisableTaskMgr restriction is enabled. To enable Task Manager, try one of these methods:

Method 1

Click Start, Run and type this command exactly as given below: (better - Copy and paste)

Method 2

Download and run this REG fix and double-click it.

Method 3

• Click Start, Run and type Regedit.exe
• Navigate to the following branch:

• In the right-pane, delete the value named DisableTaskMgr
• Close Regedit.exe

Method 4: Using Group Policy Editor - for Windows XP Professional

• Click Start, Run, type gpedit.msc and click OK.
• Navigate to this branch:

• Double-click the Remove Task Manager option.
• Set the policy to Not Configured.