Task manager has been disabled by administrator

Task manager has been disabled by administrator
To solve this problem we have to methods

Method 1
Click Start, Run and type this command exactly as given below: (better - Copy and paste)
REG add HKCUSoftwareMicrosoftWindowsCurrentVersionPoliciesSystem /v DisableTaskMgr /t REG_DWORD /d 0 /f

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:

HKEY_CURRENT_USER Software Microsoft Windows CurrentVersion Policies System
* 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:

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.