Hi, I have one win 7 system and two win 8 systems.
In essence I did a win 10 clean install, and as I had no new COA from MS, I assumed I could use my Win8.1 COA.
I am wondering if this is because of 2 possible reasons. (i) Although I pre-registered all three systems at different times, I only received one confirmation email from MS. Only one system appeared to register correctly, the other two when clicking on the task bar win10 icon just said already registered although no email address was requested in these two occasions, and no links are subsequently available. Or (ii) Although I have one confo email from MS, I have not received any further email advising or inviting me to download win 10 (is it possible that such an email would provide a COA?)
I would be grateful if someone could tell me what the process should be, and whether there is a glitch in regard the two other systems.