Z64 Windows. Possible to downgrade it?

Since the Z64 does have the Windows 10 version installed, the device is less stable.
Also Windows 10 is less stable on other computers..I do not want Windows 10 anymore on every machine.

Is it possible to downgrade the Z64 back to Window 8, the version which was installed when I bought the Z64?
Offcourse I mean the official way which Minix supports.