Question "Undoing changes made to your computer" loop after trying to upgrade to Windows 11

Vxrokk

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Oct 22, 2016
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This is kind of a two-part thing.

Had a friend message me asking if Windows 11 was worth upgrading to, said I enjoy it and recommended it.
Woke up the next morning to a message saying he had been stuck on an "Undoing changes made to your computer" screen for hours now.
Every time he boots up the PC, the only thing he can access before the loop is BIOS. IIRC, he gets an option to "Enter setup" or to choose his boot drive which brings him into the loop.

I came onto here to originally ask what the best way to wipe a boot drive with only being able to access the BIOS [on a custom PC; so no factory reset] was, but figured there might be some people that have better answers than I do to solve this without wiping the whole thing.

If there is no solution to this, like what I am kind of seeing based on loose research online, the question changes---which would be;
What's the best way to wipe a boot drive with only being able to access the BIOS on a custom built PC?

Appreciate any and all help! Thanks guys.

TL;DR: What's the best way to solve this boot loop, is it a failed SSD / boot drive like I think? And if there's no solution but the boot drive theoretically still works, how does one wipe the boot drive from the BIOS?
[ASUS ROG X570 WIFI BOARD]

Thanks guys. Any input is appreciated, I'll do my best to provide more information but I am the one that built my friend's PC for him, he's like a caveman when it comes to this.
 
It seems there a few "F-keys" that get you into bios but it seem to point to "F-8" to get to boot menu.

From there you can choose to boot off a USB with Windows 10 and or 11 and move forward with formatting drive and moving forward installing Windows.

Just an FYI I would throw in a different SSD and put Windows on different drive so the option IF your friend needs items off the boinked windows 11 that is looping those items are savable at this point.

If there is no items needed or wanted just use old drive.