2 Best Fixes for KB5029351 Unsupported Processor BSOD Error

Update your BIOS Version to easily fix this error


When something goes wrong, Windows will usually attempt to safeguard your installation, files, and apps by crashing the device, which leads to a Blue Screen of Death error. With the KB5029351 update for Windows 11, many users are complaining of frequently running into the KB5029351 unsupported processor BSOD error.

The KB5029351 update for Windows 11 is a cumulative update that includes several bug fixes and performance improvements; however, many users face problems after installing this update. Various factors could lead to this problem, but the main cause is compatibility issues between some processors and the update.

Microsoft is aware of this issue and is trying to fix it; however, there are a few steps you can take to resolve this problem, and this guide will walk you through them.

1. Uninstall the KB5029351 Update

Removing the KB5029351 update is the best way to fix this error if you do not want this update. Doing this can help resolve the KB5029351 unsupported processor BSOD error by reverting your computer to a previous version of Windows 11 that does not have the bug. This can be done by following the steps below.

  1. Forcefully shut down your PC.
  2. Once the Windows logo appears, hold down the power button to force another shutdown.
  3. Repeat this action 2 to 3 times to enter the Automatic Repair mode.
  4. Once you are in the Automatic Repair menu, navigate to Troubleshoot > Advanced options.
  5. Next, choose the command prompt from the Advanced options screen.
  6. In the command prompt, enter the command below and hit Enter.
    wusa /uninstall /kb:KB1234567
  7. Reboot your computer and check if the KB5029351 unsupported processor BSOD error persists.

2. Update your BIOS

If you want to keep and use the KB5029351 update on your Windows 11, updating your BIOS is your best bet. The MSI unsupported CPU problem has now been fixed by MSI by releasing a fresh set of BIOS updates for their 600 and 700 Series motherboards.

The upgrade will be compatible with 13th-generation devices and above. The updated Intel CPU uCode will also be included in the new BIOS to stop any further UNSUPPORTED_PROCESSOR message notifications. The steps below will show you how to update your BIOS device.

  1. Navigate to the MSI official website, scroll down to the section where you can find Motherboard Models and their corresponding BIOS Version, and download your BIOS based on your Motherboard model.
    KB5029351 unsupported processor BSOD error
  2. After downloading the zip folder, extract all the contents, copy the BIOS file to a USB drive, eject the drive, and reboot your PC.
  3. Press the delete key on your keyboard to enter the BIOS setup, and pick M-Flash.
    KB5029351 unsupported processor BSOD error
  4. Next, choose Select one file to update BIOS.
  5. Pick the USB storage that comes with the downloaded BIOS.
    KB5029351 unsupported processor BSOD error
  6. Pick the BIOS you want to update and click Enter.
  7. After the BIOS update is complete, your PC will restart automatically.
  8. Finally, check whether this process has fixed the KB5029351 unsupported processor BSOD error.

Wrapping things up

Finally, we have come to the end of this guide. If you are facing errors after installing the KB5029351 update, upgrade your BIOS; however, if you no longer need the update, you can uninstall the program completely. Tell us in the comment section if this article was helpful to you.

In a previous guide, we talked about how to resolve the luafv.sys BSOD error, so ensure to check it out.

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David Ogbor
David is a tech guru with extensive knowledge in technical articles. He is passionate about writing and presents technical articles in an easy-to-understand format for easy comprehension. He aims to present easy solutions for day-to-day problems encountered while using PC. In his spare time, he likes traveling, playing sports, and singing.