Critical ASUS Vivo AiO Windows 11 PC Frozen After Update – Must Fix Without Data Loss!

Hi everyone,
I’m in a very serious situation and need urgent help. This is not just my personal computer – it belongs to a doctor, and it contains critical, sensitive medical files that cannot be lost. Without this PC working, it will severely impact their work and patient care.

The problem:
• Device: ASUS Vivo AiO (all-in-one)
• OS: Windows 11
• After a Windows Update, the PC froze during the process.
• Now it gets stuck on the ASUS logo (boot screen) – sometimes the spinning circle freezes.
• I tried “Startup Repair” but it didn’t work.
• I also tried entering Safe Mode, but it still freezes at the ASUS logo.
• From the recovery options, when I try to “Uninstall latest Quality Update,” it says there’s “an update pending,” so it won’t proceed.

What I need:
• I must get the computer back to the last working state (before the failed update).
• This has to be done without losing any files, as they are extremely important and irreplaceable.
• I have access to another PC to create a bootable USB if needed.
• The BIOS/boot menu is accessible.

What I’ve tried so far:
• Forced shutdowns to trigger WinRE (Windows Recovery Environment) – no success.
• Startup Repair – failed.
• Safe Mode – freezes at logo.
• Tried uninstalling the latest update – blocked by “update pending” message.

Please, any step-by-step guide or proven method to remove the pending update or roll back to the last working Windows version without wiping the files would be a lifesaver.
Time is extremely critical because this is affecting a doctor’s work. I’m desperate for help – any advice with exact commands, tools, or methods will be hugely appreciated.
Thank you.