Task Manager Has Been Disabled by Your Administrator

Method 1 :

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

REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Pol icies\System /v DisableTaskMgr /t REG_DWORD /d 0 /f
Method 2 :

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

HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies\ System In the right-pane, delete the value named DisableTaskMgr Close Regedit.exe
Method 3:

Using Group Policy Editor - for Windows XP Professional Click Start, Run, type gpedit.msc and click OK. Navigate to this branch:
User Configuration / Administrative Templates / System / Ctrl+Alt+Delete Options / Remove Task Manager Double-click the Remove Task Manager option. Set the policy to Not Configured.