Task manager no longer appears

Here are safe handling:

• It is recommended that you back up the registry.
• Open Notepad (Start> All Programs> Accessories> Notepad)
• Copy and paste the text that lies between the two spaces below:
  
  Windows Registry Editor Version 5.00
  
  Code:

  ---

  [-HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ Image File Execution Options \ taskmgr.exe]

  ---

• Save this file in: Office
• Filename: fix.reg
• Type: All Files!
• Click Save.
• Quit Notepad.

Sometimes the task manager no longer appears (because of an infection often) and does not display a message "Task Manager has been disabled by your administrator" either with Ctrl + Alt + Delete or through Start Menu> Run> type taskmgr then validate.
Use File: fix.reg:
Double-click the file (Office) / Accept the warning about the merger / Do not be surprised not to see / Validate the message that the merger is completed.

Normally, the task manager can be opened again.