How can I disable the CTRL-ALT-DEL key combination completely on XP/Vista/7?

Solution 1:

Disable Ctrl-Alt-Del:

Save the following text into a text file named disableCtrlAltDel.reg:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe]
"Debugger"="Hotkey Disabled"

Enable Ctrl-Alt-Del:

Save the following text into a text file named enableCtrlAltDel.reg:

Windows Registry Editor Version 5.00

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

Double click either of them to enable / disable

Solution 2:

Disable Ctrl-Alt-Del:

1. Save the following text into a text file named disable_Ctrl_Alt_Del.reg:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout]
"Scancode Map"=hex:00,00,00,00,00,00,00,00,03,00,00,00,4d,e0,1d,e0,4b,e0,1d,00,\
  00,00,00,00

2. Double click either of them to disable