[Windows 10, 8, 7, XP etc.] jeebob:
After many, many failures... I have found the problems and the "best" way to get around them...

Basically, no matter what you do, how much you compress, what you deactivate or uninstall on this tablet, you will never have enough space to create the bootable media on your tablet. As such, you cannot create a clean slate. You also cannot create an install media from another PC. The reason appears to me, it builds the media based on a desktop PC, with universal drivers. As such, the embedded soft / hard switches, touch screen etc, is by default switched off in windows, and I can find no way to work around it, enough to the point where you can actually go through and install your backed up drivers.

The nearest option you have, which I have stumbled across is this. Do a clean restore to windows 8.1, configure it for your preferred language, and then immediately do an upgrade to windows ten. Once you are up to windows ten, run an advanced disk cleanup(cleanmgr /sageset:1) clean up all temporary files and all the bits you dont need.

This is about as close as your are going to reliably get. If you have an alternative windows tablet with more storage space - you have the option you could try creating rescue media from that, however, if you are like me and have only android tablets, and a lonely PM7W, then this really is the best you can accomplish.

I used Macrium Reflect, and took backup images, before and after every stage, so I can roll back. I suggest and almost insist you must do this, if any part of this goes wrong, there is no firmware you can flash. If you kill and cannot restore windows, the best you will get is a touchless tablet which is at best a monitor on a PC.

The easiest way to trigger a fresh rebuild (it would seem) is this... Using a partition manager tool (such as partition magic) DELETE the images folder. This is ordinarily a very bad thing, it contains all the windows backup filers, applications etc, but for a clean install it seems to be good. Delete, and reboot, Windows will come up (all in chinese) with a blue screen and a ": (" sad smiley in the top. it will try reboot and then probably return to the UEFI screen, where it allowed me to do a clean install. At one point, I believe the install just started, but as everything was chinese, I cannot remember what I pressed or did anywhere!

Anyway, let it run windows installation. Next, just try follow the best you can and set the language. If you have an android phone, download "translate" from google, I found the best thing here was to take a photo of the text and let it translate the best it could, that way, I could setup the language to any version of english (US, UK, Ireland). that gave me a very basic start. I then followed the setup and got it booted to the desktop.

Next, I set windows to use English UK as the default language for the OS, followed by Keyboard, Regional settings etc, and followed the prompts to set English as the default language on the windows and welcome screens. This should hopefully stop the odd chinese symbols appearing here, there and everywhere. Next, I did disk cleanups, uninstalled the office 365 app, as I didnt buy the license, so it just cleaned up the PC. Finally after cleaning and faffing throughout, I am now downloading windows 10 and letting it do the upgrade.

Once complete, I should have a completely "English Language" installation of Windows 10, which after I remove all the old files, windows installations etc (and as I have no files or applications installed at all prior to the upgrade!) - this is about the best I will get!

I hope this is of some use to any of you, I will let you know if I hit any further road blocks, though I suspect it should be relatively plain sailing hereon.