1. install RDP wrapper
2. net stop termservice
3. take rdpwrap.ini from https://github.com/affinityv/INI-RDPWRAP and put it to c:/Program Files/RDP Wrapper/rdpwrap.ini
4. net start termservice
5. add remote desktop user https://sysadmin.ru/articles/rdp-wrapper
dont forget to turn off auto updates 😀 https://blog.simplix.info/disable-update-win10/

p.s. How-to check windows serial in uefi tables:
1. on linux: sudo tail -c +56 /sys/firmware/acpi/tables/MSDM
2. on windows: https://www.nirsoft.net/utils/firmware_tables_view.html