Task Manager Disabled?

Taskmanager grayed out?like this..

There could be two reasons for this. One of the reasons: the account you use has been blocked via the “Local Group Policy” or“Domain Group Policy”. To re-enable the Task Manager, run Gpedit.msc. Navigate to User Configuration > Administrative Templates >
System > Ctrl+Alt+Del Options. Set the “Remove Task Manager” option in the right side to “Disable” or “Not Configured”. Close
Gpedit.msc. Then run “gpupdate /force”. The second possibility: the problem could be because of a change in the Registry settings,
which can be corrected thus:Open Regedit.exe, and navigate to and
correct the keys as below (you should be Administrator on your machine):
[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\Version\Policies\System]“DisableTaskMgr”=dword:00000000

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

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