Bootcamp failing to install Win10 on old MBP

Duel I believe. In the interest of providing forthright information I've taken a bunch of screenshots of what I hope are relevant specs (sorry for image spam):

USB deets:

The BC partition

Device overview:

Graphics:

My USB structure before restart. Potentially important here is that sometimes after running Bootcamp, the $WinPEDriver$ and Bootcamp folders are empty. In this instance I've separately downloaded the support files to local disk and copied across.

Hope this helps in some way. Thanks for the interest!

Ok so some progress to report:

I downloaded an older Win10 iso following the instructions here (unfortunately I didn't note which version I downloaded, however I do know it was the earliest available) and used BC to format and then copy to the same generic USB I mentioned earlier (I don't have another to use right now). I also copied over the $WinPEDriver$ and Bootcamp folders also mentioned earlier because - not for the first time - after running BC those folders mentioned were empty.

Upon restarting the machine and booting to EFI I saw this heavenly vision:

Feeling cocky I accepted the defaults and clicked Next.

Then, I was greeted with this:

Clicking OK just showed another error of similar wording, and Browse didnt help as whenever I picked a source it showed an error dialog saying it couldn't find any drivers.

Just wanted to post my progress, and it does feel like progress, in case there's any snippet of information that may help move things along.

Huh, interesting. Perhaps I can simply try the next ISO on the Media Creation Tool list then.

To answer your questions, the downloaded ISO filename was simply named "Windows10Home.iso". I can't remember if I rename this as part of the ISO download process. I've just reran MCT (see below screenshot) and picked version 1607 to download, and when it came to saving the ISO, the prepopulated name was simply "Windows.iso". Perhaps this was the case for previously, too. Sorry that's not very helpful.

As for the MD5:

certutil -hashfile Windows10Home.iso MD5
MD5 hash of Windows10Home.iso:
7a3d39f06101c9af1dd562ff5835dffc

Finally just for reference, I re-ran the MCT to check which version number I downloaded (1507):

Very much appreciate your help thus far Loner T, thank you.

Thanks for the reply.

I've re-ran the BC process again, and checked the USB before restarting and indeed it was an MBR in exFat. However, upon restarting and booting to the EFI, the same problem manifested itself. Gets as far as the blue screen and then, power off.

Hi Loner T

Thanks again for the insight. I've checked and can indeed confirm I'm using the 20H2 ISO, and that the BC package is version 6.0.6136. I'll see if I can find an earlier ISO, and if there are more up to date drivers at NVIDIA and replace those on the USB. Do I presume correctly that I should simply replace the whole BootCamp > Drivers > Nvidia folder?

I'll also use a USB2 external HDD and see if that helps anything too.

Will report back with my progress in a few days, baby permitting.

Cheers

p.s. I absolutely love this MBP. I only upgraded because I live in a sub tropical climate and the old girl felt like it might melt at any given moment. Still does a great job for a 7 year old machine though.

Oh really? I was under the assumption the batch file I’m using links only to Microsoft sources (says that on the output too). If that’s not the case I’m defo going to have to look elsewhere for an ISO. Back to square one I go :/