Windows 11 Update KB5029351, released on August 2023 is known to cause a blue screen type error depicting an error message – “UNSUPPORTED_PROCESSOR.” This Stop Error Code appears on Windows 10 PCs as well when respective users install a cumulative update named “KB5029331.”
Though it’s still not clear why this error is appearing in the first place, it is assumed that an incompatible processor is causing this issue. We say so because this blue screen of death error occurs mostly on motherboards made by MSI. Moreover, it most appears on motherboards using Intel’s 600 series (690) and 700 series (Z790) processors.
Several users have encountered and reported this issue and the best thing is that Microsoft has also acknowledged this issue. Moreover, the company has also reported investigating this issue and will soon release an update fixing this BSOD error.
When facing this error code, the first thing you must ensure is reporting it to Microsoft using the Feedback Hub app. The company might take some time to release an official solution to fix this issue. Till then, you may try uninstalling the recently installed update from your system.
When this error occurs, you will no longer be able to get past the Blue Screen, including the Lock Screen. As per the official sources, this issue might automatically uninstall itself. However, if the same doesn’t happen, you must use either Automatic Repair, or boot into WinRE and reset your PC.
While in the Windows Recovery Environment, open Command Prompt and uninstall the recently installed cumulative update i.e. KB5029351 on Windows 11 or KB5029331 on Windows 10. For this, you may use this code –
wusa /uninstall /kb:5029351
wusa /uninstall /kb:5029331
After this update is removed, boot into your device normally and check if the “UNSUPPORTED_PROCESSOR” error is resolved now.
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