Users of HP devices report significant issues when installing the Windows 11 cumulative update KB5121003, released in August. According to reports, the installation process fails during the restart phase, leaving computers stuck on the HP logo screen.
Affected devices automatically trigger a diagnostic and repair sequence, which eventually rolls back the update to the previous version. One user, identified as Rob, experienced this failure on an HP OmniBook X Flip 14-inch laptop, model 14-KC0013DX, equipped with an AMD Ryzen AI 5 430 processor.
The system error associated with this update failure is identified by the code 0x800f0845. Community discussions on Microsoft forums indicate that at least 20 users have encountered similar problems with the update process on their HP hardware.
