Enable Task Manager

1) Run regedit
2) Go to
HKEY_CURRENT_USER\Software\Microsoft\Windows\ CurrentVersion\Policies\system
3) In the right pane, look for the value: DisableTaskMgr
4) Delete the subkey (Give yes when prompted)
5) Go to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\ CurrentVersion\policies\system
6) In the right pane, look for the value: DisableTaskMgr
7) Delete the subkey (Give yes when prompted)
8) File/Exit
9) If it is still not accessable then reboot to safe mode and start from the beginning.