Reinstall windows 8 to create a"system reserved partition"

[appros]

Hi guys,
I am having trouble upgrading to windows 10.
I believe the source of my problems is the lack of a system reserved partition. I tried resetting the tablet using the 'reset' option in advanced recovery, though didn't seem to get another system reserved. How can I reinstall windows on this tablet, considering I have no product key though be sure windows creates a system reserved partition?