Why A PC Won’t Boot After A Windows 11 Update

Updating to the latest version of Windows 11 should enhance your PC’s performance and security, but sometimes, it might cause your system to fail to boot. This guide provides comprehensive steps to fix boot issues post-update, whether you encounter a black screen, repeated shutdowns, or freezing at startup.

Understanding Boot Failures Post-Windows 11 Update

While Windows 11 brings new features and improvements, it’s not uncommon for some PCs to experience boot failures after an update. Issues could arise from power supply problems, hard drive corruption, conflicts with external devices, or outdated drivers.

Diagnosing and Fixing Boot Issues

1. Verify System Requirements

Ensure your PC meets the minimum system requirements for Windows 11. Incompatibilities can prevent successful booting. Update your drivers to ensure all hardware components are fully compatible with Windows 11.

2. Reset the Power Supply

If your PC does not power on:

  • Check and secure all connections to your power source.
  • Allow your battery to charge fully if using a laptop.
  • Consider testing with an alternative power cable or battery to rule out power supply issues.

3. Inspect the PC Monitor

Make sure your monitor is functioning:

  • Try connecting to an external monitor to determine if the issue lies with your primary display.
  • Check for any signs of failure in your display adapter and consider replacing it if necessary.

4. Disconnect External Devices

External devices can interfere with boot processes:

  • Power down your PC.
  • Disconnect all peripherals (USB drives, printers, etc.).
  • Restart your PC to see if it boots without these devices.

5. Utilize Command Prompt for Repairs

Access Command Prompt from the Windows Recovery Environment to perform system checks and repairs:

  • Use commands like chkdsk c: /f /r to check the disk for errors.
  • Use Bootrec commands to repair Master Boot Record (MBR) issues: bootrec /FixMbr, bootrec /FixBoot, and bootrec /RebuildBcd.

6. Startup Repair and Safe Mode

Attempt repairs using Windows 11’s built-in options:

  • Access Startup Repair from the Advanced Options in the recovery environment.
  • Start your PC in Safe Mode to diagnose issues with minimal drivers and software running.

7. System Restore

If startup repairs do not resolve the issue:

  • Use System Restore to revert your system to a previous state before the update issues began.
  • Ensure your data is backed up before performing a system restore as this can potentially erase recent files and settings.

8. Reinstall Windows 11

As a last resort, consider reinstalling Windows 11:

  • Ensure you back up all important data to another storage device.
  • Use a bootable USB drive or DVD with Windows 11 installation media.
  • Follow on-screen instructions to reinstall the OS, which should resolve persistent boot issues.


Boot issues post a Windows 11 update can range from simple fixes like checking power connections to more complex solutions such as performing a system restore or reinstalling the OS. By following these steps, you can diagnose and potentially fix your PC’s boot problems, restoring functionality and allowing you to take advantage of the latest features and security updates provided by Windows 11.


  1. you didn’t help at all.
    complete black screen.
    won’t even let me go to the bios or anything else.

    1. Avatar for Marlo Strydom Marlo Strydom says:

      Hi Brian,

      I’m sorry to hear that you’re having this issue. It sounds like your problem might be better addressed in my other post: https://computerinfobits.com/computer-not-posting/. This article covers various steps and troubleshooting methods that are more suited to issues like not posting and inability to access the BIOS.

      If the steps in that post don’t resolve your issue, it may be best to seek professional help, as the problem could be hardware-related.

      I hope this helps! Please let me know if you have any further questions or if there’s anything else I can assist you with.

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