Stuck on the CTRL+ALT+DEL Screen? Here’s How to Fix It

If you are stuck on the CTRL+ALT+DEL screen and Lock, Sign out, Task Manager, or Cancel will not respond, start with a full restart. If the problem comes back, use Windows Recovery Environment (WinRE) to repair startup, test Safe Mode, repair system files, and check recent drivers or updates. On modern Windows, this is the Windows Security secure screen; the old GINA terminology used by much older versions of Windows no longer applies.

Windows Security screen showing Lock, Switch user, Sign out, Task Manager, and Cancel — The CTRL+ALT+DEL security screen should remain responsive even when a normal desktop app is frozen.

These steps apply to Windows 11 and Windows 10. Microsoft ended free Windows 10 support on October 14, 2025, so a Windows 10 PC that can upgrade should move to a supported Windows release.

1. Restart the PC first

If the screen is completely frozen, press and hold the physical power button until the PC turns off, then turn it on again. A forced shutdown can lose unsaved work, so use it only when the keyboard and on-screen controls are not responding.

Finger pressing and holding a laptop power button to force a shutdown — Use a forced power-off only when Windows no longer accepts input.

If CTRL+ALT+DEL works normally after the restart and the issue does not return, no further repair may be needed. A Restart is especially useful because Windows performs a full boot cycle; Fast Startup does not apply to Restart.

2. Run Startup Repair from Windows Recovery Environment

If the freeze happens repeatedly, open Windows Recovery Environment. If Windows still reaches the desktop, go to Settings > System > Recovery > Advanced startup > Restart now. On Windows 10, the path is Settings > Update & Security > Recovery.

If Windows cannot start normally, Microsoft says you can interrupt boot twice by powering off when the Windows or manufacturer logo appears. On the third start, Windows should enter Automatic Repair. Choose Advanced options.

Windows Recovery Environment Choose an option screen with Troubleshoot selected — In WinRE, select Troubleshoot to reach the repair tools.

Then select Troubleshoot > Advanced options > Startup Repair > Restart. Microsoft documents Startup Repair as a tool for problems involving damaged system files, boot configuration, incompatible drivers, and some registry errors. If BitLocker is enabled, you may be asked for the recovery key.

Windows Recovery Environment Advanced options screen with Startup Repair highlighted — Startup Repair is the least disruptive WinRE repair to try before reset or reinstall options.

3. Test Safe Mode and recent drivers

From WinRE, go to Troubleshoot > Advanced options > Startup Settings > Restart, then press 4 or F4 for Safe Mode. Microsoft explains that Safe Mode starts Windows with only essential drivers and services. If CTRL+ALT+DEL works there, a recently added driver, service, or application is a stronger suspect.

Windows Startup Settings screen with option 4 Enable Safe Mode highlighted — Safe Mode helps separate basic Windows components from third-party software and drivers.

If the problem began immediately after a display-driver update, open Device Manager > Display adapters, open the graphics adapter, choose the Driver tab, and use Roll Back Driver if the button is available. Do not roll back a working driver just because the option exists.

Device Manager graphics adapter properties with the Roll Back Driver button visible — Roll back a driver only when the problem began after that driver changed.

4. Repair Windows system files with DISM and SFC

If Windows starts normally or in Safe Mode, open Command Prompt as administrator. Microsoft recommends running DISM before System File Checker. Run these commands one at a time and let each finish:

DISM.exe /Online /Cleanup-image /Restorehealth
sfc /scannow

Restart Windows after both scans complete. See Microsoft’s DISM and System File Checker instructions for the official procedure.

Administrator Command Prompt showing DISM RestoreHealth and sfc scannow commands — Run DISM first, then SFC, from an elevated Command Prompt.

5. Test Fast Startup only if the timing fits

Fast Startup is not a universal cause of a frozen CTRL+ALT+DEL screen, and Microsoft does not recommend disabling it by default. However, it is worth testing if the problem appears after a shutdown and power-on but not after a Restart. Fast Startup preserves part of the kernel session during shutdown, while Restart performs a full boot.

Open Control Panel > Hardware and Sound > Power Options > Choose what the power buttons do. Select Change settings that are currently unavailable, clear Turn on fast startup (recommended), save, and test one normal shutdown and power-on. If nothing changes, turn Fast Startup back on. Microsoft explains the behavior in its Fast Startup documentation.

Control Panel Power Options System Settings showing the Turn on fast startup checkbox — Use Fast Startup as a targeted diagnostic test rather than a blanket fix.

6. If the problem started after an update

Go back to WinRE and choose Troubleshoot > Advanced options > Uninstall Updates if the issue started immediately after a Windows update. If you have a restore point from before the problem, System Restore is another option. Back up important files before using recovery features, and avoid Reset this PC or a clean reinstall until the less disruptive repairs above have failed.

If CTRL+ALT+DEL still freezes even in Safe Mode after Startup Repair and system-file repair, the problem is more likely to involve a deeper driver, hardware, or Windows installation fault. At that point, use Microsoft’s Windows recovery options or your PC manufacturer’s support channel before reinstalling Windows.

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