While Microsoft suggests that users should reach out to their device’s processor manufacturer (e.g., Intel and AMD) if they continue experiencing issues, only Taiwanese PC vendor MSI has officially confirmed that users of some of its motherboard models might be affected by this known issue.

“MSI has received several reports of users encountering a Blue Screen of Death that has an error message that reads ‘UNSUPPORTED_PROCESSOR’ with MSI’s 600/700 series motherboards after installing the Windows 11 update, KB5029351 Preview,” the company said on Friday.

“Both MSI and Microsoft are aware of the ‘UNSUPPORTED_PROCESSOR’ error and have begun investigating the root cause.”

MSI has also cautioned all users against installing the August 2023 preview updates on their Windows devices.

For those who have already deployed these updates and experienced blue screens, the recommended course of action involves reverting their BIOS to an earlier version and uninstalling the problematic optional Windows updates.

The computer hardware vendor provides guidance on using M-FLASH to revert motherboard firmware to a previous version in this video.

Intel told BleepingComputer they’re “aware of these reports and actively working with Microsoft to investigate and resolve.”

An AMD spokesperson was not available for comment when contacted by BleepingComputer earlier today.