Microsoft is currently investigating an issue that is causing some Windows 11 users to experience BSODs (Blue Screen of Death) with an “UNSUPPORTED_PROCESSOR” error message after installing the latest optional update for the operating system (KB5029351). This update was released two days ago and includes a few changes that will be included in the next month’s Patch Tuesday update.

According to the Windows Health Dashboard, Microsoft has received reports of users encountering an “UNSUPPORTED_PROCESSOR” error message on a blue screen after installing the updates released on August 22, 2023 (KB5029351) and restarting their devices. The company is currently investigating to determine if this issue is caused by Microsoft.

Multiple reports on Reddit and The Verge suggest that the problem appears to be affecting users with certain MSI motherboards who have installed the latest BIOS updates from the company. However, affected users may notice that Windows 11 automatically uninstalls this latest optional patch after encountering the BSOD with the “UNSUPPORTED_PROCESSOR” error message, which should restore normal functionality.

While Microsoft continues to investigate the issue, they are encouraging affected users to file a report in the Feedback Hub. The company will provide more information in the near future. In the meantime, it may be advisable to skip this week’s optional patch for Windows 11 version 22H2.

In a recent article by Paul, it was mentioned that this optional update brings a few minor changes to the OS. These include a new hover behavior on the Search box in the taskbar and the ability for apps to direct users to the Settings page where they can configure the default app for opening specific file types. Additionally, a new policy allows IT professionals to configure optional Windows 11 updates, including controlled feature rollouts (CFRs).