Tried updating from 25295.1000.
Got to 100% and GSOD with error in FLTMGR.sys.
Reverted to a previous backup of the same release and it failed again with the same error.
Have you tried running sfc /scannow?
Have you run the Windows Update Troubleshooter?
Are all your drivers up to date?
Also please file this issue in the Feedback Hub. WIN+F
Just got the same GSOD FLTMGR.sys going from 25300.1000 to 25309.1000, it rolled back to 25300.
Running Troubleshooter now.
Edit,
I couldn't find anything useful from the troubleshooter, so I updated again, this time offline using ISO.
The update completed fine. Clearly with the same screwed up desktop with all my icons reshuffled and rearranged. 🤬🤬