Microsoft is Investigating CPU-Related BSOD Errors on Windows 11

Microsoft is investigating an issue causing some Windows 11 users to see BSODs with an “UNSUPPORTED_PROCESSOR” error message after installing the latest optional update for the OS (KB5029351). This update was released two days ago, and it includes a couple of changes that will be included in next month’s Patch Tuesday update.

“Microsoft has received reports of an issue in which users are receiving an “UNSUPPORTED_PROCESSOR” error message on a blue screen after installing updates released on August 22, 2023 ( KB5029351) and then restarting their device,” the company explained on the Windows Health Dashboard. “We are presently investigating to determine if this is an issue caused by Microsoft,” the company added.

According to multiple reports on Reddit (via The Verge), the issue seems to be affecting users with some MSI motherboards who installed the company’s latest BIOS updates. However, after encountering the BSOD with the “UNSUPPORTED_PROCESSOR” error message, affected users may see Windows 11 automatically uninstall this latest optional patch, which should bring things back to normal.

As Microsoft continues to investigate the issue, it’s also asking affected users to file a report in the Feedback Hub. The company plans to share more information soon, but in the meantime, you may want to skip this week’s optional patch for Windows 11 version 22H2.

As detailed by Paul earlier this week, this optional update introduces a couple of minor changes to the OS: There’s a new hover behavior on the Search box in the taskbar, and apps can now direct users to the Settings page where they can configure the default app to open a specific file type. Lastly, a new policy lets IT pros configure optional Windows 11 updates, including controlled feature rollouts (CFRs).