scusi, thank-you for your detailed post on flashing the Windows 10 image, it was a great help.
My Hi12 came with windows already set up, ie. with an "admin" user and preferences set. I used the "Reset Windows 10" option, but I wasn't convinced it did the job of a perfect reset. One major problem I had was quite some latency/lag with the WiFi (basically slow browsing), which was marginally improved by disabling bluetooth. During my testing just now this has been fixed by flashing the supplied image, and the tablet definitely feels much snappier in general.
Some comments on top of that which may be helpful to others:
- I selected "USB key" I think from the BIOS boot menu and that worked fine, and I didn't have to change that again at all (but I guess I should to avoid future issues)
- For the larger USB drive I just used a regular SD card reader with a 32GB Micro SD card (I have done this quite a few times for installing things). I suspect putting an SD card in the SD slot might work.
- After the windows PE stuff completed the tablet switched itself off. At this point you MUST remove both USB devices (or at least the smaller one) before switching the tablet on (long press on the power switch)
- After doing the original full "reset" on Windows 10 (with the image it came with) it didn't seem to detect the device was a tablet (ie. entering a WiFi password during setup required plugging in a keyboard)
So, overall, I'd recommend that any competent user who understands scusi's guide does the reflash as a first step on receiving the tablet.