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In reference to another post about the Respondus Lockdown Browser, I was wondering how can a program edit and remove parts of the "Secure Desktop" Ctrl+Alt+Del menu in Windows, as well as disable the power button at the bottom right?

Is this safe?

This is what happens when trying to Ctrl+Alt+Del with Respondus Lockdown Browser running in the background:

Windows Lockscreen while running Respondus Lockdown Browser in the background

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This is mainly hardening configurations done from registry keys, they can be configured from the Local Group Policies, GPO or directly from regedit. They key is located here:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System

Note that the following path is targeting the current user (HKCU), you can also target at the computer level (HKLM).

From there, you can create/modify multiple strings values and disable or turn them on (set to 0 or 1) :

DisableLockWorkstation
HideFastUserSwitching
NoLogoff
DisableChangePassword
DisableTaskMgr

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