Unable to install Windows 11 Update Version 23H2 (KB5036980)

Hi mate.
That didn't work, but I finally got a response from a M$ Support agent. After an hour or so of trying everything I have already done, he downloaded an iso file to my lappy. (I hadn't tried that option, but the "destructions" said I need a DVD burner, which I don't).
Even that didn't work! So he did a "custom install". The GUI looked like something from Windows 98/2000, but it installed very nicely.
I tried to post this reply yesterday, but the Submit button just produced a message in red type, saying the reply had to be 6 letters or more!

I'm hoping that doesn't happen, as I want to thank you for your ideas.

Cheers!

i want your help. my system unable to install windows 11

OK, Neils, do an sfc /scannow, copy and past it just like that. You apparently have some corrupted files on you machine that is not allowing the install to complete. I recommend that, any files you need to save, save them to a flash drive, and do a clean install of 11 from the USB drive that you make from msert.

Click on Download Windows 11 (microsoft.com) and create a USB flash drive for Win 11. Look, I know that works. That's what I did to get 11 in the first place, cuz my Insider update failed.

Run rhe scan and let it repair what it can. Make the .iso flash drive and let it run for a clean install.

I'm sorry you are having so many issues with this. I am an IT helpdesk tech and I know how balled up MS is with their "update".

Hi mate. Thanks for your suggestions. I'm certain there are corrupted files somewhere, as the list of issues is growing. I used to be a Helpdesk Tech too, but the politics made more than one workplace toxic, so I got out of the industry altogether. Hats off to you for staying in the job!
I've done the sfc /scannow a couple of times. It always comes back with no problem found. Curiously, the msert scanner showed 18 "infected files" while running, but then said there were no infected files found, when the scan finished. I downloaded and ran it twice. The second time, it showed 30 infected files while running, but none when finished.

I'm beginning to think maybe I have a rootkit, or similar, as I'm also now finding I have no access to the C:\Windows\System32 folder, to rename the catroot2 folder. (This happens through Windows Explorer and cmd in Administrator mode).

I'm currently formatting a 64 GB thumb drive. I hope that's big enough to hold the Windows .iso

Hang on to your hat, I'll get back if it works!

OK, Neils, do an sfc /scannow, copy and past it just like that. You apparently have some corrupted files on you machine that is not allowing the install to complete. I recommend that, any files you need to save, save them to a flash drive, and do a clean install of 11 from the USB drive that you make from msert.

Click on Download Windows 11 (microsoft.com) and create a USB flash drive for Win 11. Look, I know that works. That's what I did to get 11 in the first place, cuz my Insider update failed.

Run rhe scan and let it repair what it can. Make the .iso flash drive and let it run for a clean install.

I'm sorry you are having so many issues with this. I am an IT helpdesk tech and I know how balled up MS is with their "update".

Option 1: Chose to update and restart, but my host did not go into update mode either on shutdown or restart.

Option 2: Had no impact after restart, in fact after restart Win Update failed at the point of download in Windows Update manager.

Option 3: Failed during installation phase of direct update with an error code that appeared so momentarily I could not capture it.

Incidentally the previous update also failed