How to Require Ctrl+Alt+Delete at Windows Sign-in

This guide explains how to configure the requirement for pressing Ctrl+Alt+Delete before signing in to Windows using the Windows Registry Editor. By modifying a specific DWORD value, you can enforce this secure sign-in feature to protect against malware masquerading as the login screen or disable it for faster access.

The Registry Key and Value

The Windows sign-in screen requirement for the Ctrl+Alt+Delete sequence is controlled by the DisableCAD value located in the Winlogon registry key.

• Registry Path: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
• Value Name: DisableCAD
• Value Type: REG_DWORD (32-bit Value)

Value Data Settings

The behavior of the sign-in screen depends on the numeric data assigned to DisableCAD:

• Value Data 0 (Zero): Enables the requirement. Users must press Ctrl+Alt+Delete to access the sign-in prompt (Secure Sign-in is ON).
• Value Data 1 (One): Disables the requirement. Users are taken directly to the user selection or password entry screen without pressing Ctrl+Alt+Delete (Secure Sign-in is OFF).

How to Modify the Setting

1. Press Windows Key + R, type regedit, and press Enter to launch the Registry Editor.

2. In the navigation pane, navigate to the following path:

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

3. Look for the DisableCAD value in the right pane.

   • If DisableCAD exists, double-click it to edit its value.
   • If DisableCAD does not exist, right-click in an empty area of the right pane, select New > DWORD (32-bit) Value, and name it DisableCAD.

4. Set the Value data to 0 to require Ctrl+Alt+Delete, or set it to 1 to disable the requirement.

5. Ensure the Base is set to Hexadecimal (or Decimal, as both represent 0 and 1 identically), then click OK.

6. Restart your computer for the changes to take effect.