In this tablet you can’t do factory reset on Windows, else it’ll stuck and then you can’t boot windows.
[Tutorial/Download] Teclast X80 Pro Windows 10 reset
Only way now is to reinstall windows using teclast windows firmware. You can’t install with Microsoft windows installation disk as it doesn’t create UEFI partition that the bios recognised.
You need to get your tablet model number firmware, cannot use other model firmware as the driver is different