Microsoft has confirmed a Blue Screen of Death (BSOD) issue with the error message “UNSUPPORTED_PROCESSOR” in Windows 11. The issue occurs after installing monthly fix package KB5029351, which began distribution earlier this week.
“We are currently investigating whether Microsoft is causing this issue. We will announce details as more information becomes available.says a Microsoft post that appeared in Windows Health Center.
According to the source, the mentioned error occurs after installing the update on computers with certain models of MSI motherboards. For example, an update results in a BSOD on a computer with an Intel Core i9-13900KS processor and an MSI MPG Z690 Carbon Wi-Fi motherboard. Reddit platform users are reporting a similar error, but in all cases they are Intel processors and MSI motherboards with the latest BIOS version.
The good news is that after a BSOD occurs, users can fix the problem by reversing the changes they made previously. Microsoft appears to have removed update KB5029351 from affected systems after identifying the issue, however it is still available for installation on compatible Windows 11 devices. BIOS updates that MSI has released for their motherboards. Official representatives of MSI have not yet commented on this topic.