How do you enable task manager in your computer?
Click Start, Run type "cmd" into the run box. Copy and paste the following text into the command line.
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 0 /f
Note: command line will only receive pasted text with right-click paste.
either that or
Press Alt-Control-Delete, a back-up menu screen will pop up. Among those options, the task manager will be among them. Click it and it should work.
Task Manager is the controller of all programs on your computer (other than yourself) so try not to screw up.