How to Fix Windows 11 Stuck on Startup After KB5043145 Update

This guide offers solutions for resolving the Windows 11 startup freeze issue following the KB5043145 update. This frustrating problem, where Windows hangs indefinitely at the logo screen, can be addressed using several methods. Avoid forceful shutdowns to protect your data.

Method 1: Safe Mode Boot

Safe Mode starts Windows with minimal drivers, helping identify if a specific application or system issue is causing the problem.

1. If Windows is frozen at the startup screen, repeatedly restart your computer (three or more times) until the "Preparing Automatic Repair" screen appears.
2. Navigate to Advanced options > Troubleshoot > Advanced options > Startup Settings > Restart.
3. Press F4 to select Safe Mode.

Method 2: System File Repair

This method uses a command to check and repair corrupted system files or disk errors that might be preventing a proper boot.

1. Restart your computer three times to reach the "Preparing Automatic Repair" screen.
2. Select Command Prompt from the Advanced options menu.
3. Type bootrec.exe /fixmbr and press Enter. (Note: The original input contained a typo; this is the corrected command.) Allow the repair process to complete.

Method 3: System Restore

System Restore reverts your computer to a previous state, potentially resolving the issue. Back up your data before attempting this.

1. Press F8 or Shift during startup.
2. Select your account, enter your password, and click OK in Windows Repair Mode.
3. In Advanced options, choose System Restore.
4. Select a restore point from before the problem started and click Next. If necessary, select "Show additional restore points."

Method 4: Clean Windows 11 Reinstallation

A clean reinstall provides a fresh start, removing potential conflicts and issues. Back up your data before proceeding.

1. Use a working computer to download the Windows 11 Media Creation Tool.
2. Create installation media (USB drive or DVD).
3. Connect the media to your frozen computer and change the boot order to boot from the media.
4. Perform a clean installation of Windows 11.

Important Note: Always back up your important data before attempting any of these methods. If data loss occurs, consider using data recovery software like MiniTool Power Data Recovery (free for 1GB of recovery).

This guide provides multiple approaches to fixing the Windows 11 startup issue after the KB5043145 update. Hopefully, one of these solutions will restore your system to normal functionality.

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