How can you use Windows Startup Repair to fix boot-related issues in Windows 10 or 11?

Steps to use Windows Startup Repair to fix reboot and select proper boot device error.

1. Access WinRE: Restart and press F8 or similar, or let WinRE open automatically after multiple boot failures.

2. Select Startup Repair: Go to Troubleshoot > Advanced options > Startup Repair.

3. Run the Repair: Choose your account, enter your password if prompted, and let it scan for issues.

4. Restart to check if the problem is resolved.