mason marnell@1457018692 :
If I'm going to reinstall windows 8.1 and have already reserved (but not installed) windows 10, Can I still upgrade to Windows 10 after I reinstall 8.1?
Yes you can.
After all the updates for 8.1, you will see the reservation thing again.
I just bought a little laptop...ASUS Transformer. Arrived yesterday. Updates finished today, and the Reservation thing appeared today.
Reserved, and we shall see when the "OK, I'm ready" notification appears.
Or, just update via the MediaCreation tool.