Hello
In Windows login screen you should have option to recovery where it will trigger some security questions for you, etc.
If no way you know the password and/or device was not yours. Clean Installation is the only option.
To do it, you may follow same procedure as commented on following post.
Herobox will not boot (180G20080593) - MiniPC / HeroBox - CHUWI | Official Forum
As in Microsoft website where it’s explained in details.
Create a recovery drive (microsoft.com)
Regards,