Installed windows 8.1 and the touchpad stopped working, although everything worked well on windows 10. What is the problem ?
Open the device manager and check if you have any yellow triangle on the touch and mouse device. If so, you must install the necessary driver to make it work.
You can find the drivers here: [Herobook] [Official Version] Chuwi Herobook Windows,drivers,bios,EC,tutorial download
I do not have yellow triangles in touch and mouse devices. In the list of HID devices there is a compatible HID touch control panel, but it has a driver from Microsoft.
Although it doesn’t have a yellow triangle, try installing the original