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Windows server 2022 is not updating with latest patch KB5126655
Windows server 2022 is not updating with latest patch KB5126655. However, successfully installed 2026-10 Cumulative update for .Net framework. Last successful Cumulative update for the operating syst...
I had the exact same issue. I managed to fix it after spending some time with it...
Long story short:
The update corrupts the Bootmgr.
Recovery process:
2x USB (1 with WinServ22) and another one is clean.
Boot into windows Recovery using the USB.
Roll the update back.
Create a new bootmgr on your second usb.
Reboot, remove USB with WinServ22.
During reboot go the boot selector and select your 2nd usb with the Bootmgr, boot from that using Legacy boot not UEFI. That will "finish" the update and allows you to boot into windows.
Once in windows, copy over the bootmgr from your usb to the boot partition (will need to remove/add permissions to be able to do it) once that is complete, you can boot up the server normally without the USB.