New Windows updates cause UNSUPPORTED_PROCESSOR blue screens


Microsoft says the August 2023 preview updates released this week for Windows 11 and Windows 10 systems are causing blue screens with errors mentioning an unsupported processor issue.

The updates in question are tagged as KB5029351 (Windows 11) and KB5029331 (Windows 10), and they come with Search app fixes and introduce a new Backup app, respectively.

The complete list of affected platforms includes Windows 10 21H2/22H2 and Windows 11 22H2.

“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 2,” Redmond said.

The company also added that the problematic cumulative updates “might automatically uninstall to allow Windows to start up as expected.”

Some customers who experienced this issue reported [12] have already confirmed that the buggy optional updates were automatically rolled back after several reboots.

Microsoft is investigating the newly acknowledged known issue to find out whether it stems from a Microsoft-related cause.

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