Did you manage to get the key working? I had also do new installation for Windows but i cant activate it now. I send message to chuwi support and I’m cuurently waiting their response.
You should install the correct edition of Windows 10. You can check your current OEM key using that tiny little utility ShowKeyPlus.
Your edition should be Windows 10 Home as default. Your current OEM key must be recognized by ShowKeyPlus as for Win 10 RTM Core OEM: DM edition. If it matches, then you will not have problems with activation.
If the touchscreen won’t work or tablet stops functioning, you need to learn the process to fix windows 10 touch screen not working issue. In order to use the below solutions access to the windows 10. Remember while you use mouse and keyboard by plugging in, the touchscreen might work back again successfully.
Rather, I think it’s a driver issue if the touch screen does not work after installing Windows from a Microsoft ISO. You have to find the corresponding drivers for the tablet model and install it on your computer, then everything has to work correctly. I recommend enabling the installation of unsigned drivers in Windows before going to restore the drivers.