Disable ctrl-alt-del on windows 7

There is a blue screen that appears when you press ctrl-alt-del on windows 7 or vista. I figured out how to disable the taskmanager but users can still shutdown the machine.

How can I prevent them from being able to do this?

Solution 1:

Because it is the login system of Windows that traps the CTRL-ALT-DEL combination (and so it is not accessible to user applications), you will need to change the system's keyboard scancode map to ignore at least one of those keys.

Solution 2:

User Key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\
Explorer]
System Key: [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\
Explorer]
Value Name: NoClose
Data Type: REG_DWORD (DWORD Value)
Value Data: (0 = shutdown enabled, 1 = shutdown disabled)


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\Current Version\Winlogon]
Value Name: ShutdownWithoutLogon
Data Type: REG_SZ
Value Data: 0