Task manager has been disabled by administrator?

Does the message "Task manager has been disabled by administrator?" shows up when you hit Ctrl + Alt + Del ?

This can be solved by the follwoing method:

Open Registry Editor (Regedit.exe) and navigate to:
HKCU \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies\ System
In the right-pane, double-click DisableTaskMgr and set it's data to 0

Or:
Download and run this REG fix and double-click it.