I recently upgraded my mobo and in preparation got a digital Win10 license connected to my MS account as suggested here: How to Reactivate Windows 10 After Changing Hardware

I simply hooked my old SSD to the new mobo and Win10 took a little extra time to boot and was up and running -- not like the bad old days However, when I tried to activate Win10 using the digital license per the above it didn't work - there was no license for this type of device, which I assumed meant a PC. So I chatted with a MS tech and he kindly connected to my machine and activated it for me. I also went to my MS account and got a digital license for the new mobo.

However, a couple days later I noticed that I now have a product ID that ends in -AAOEM I assume this means it is an OEM license which cannot be transferred if I replace the mobo again.

I originally purchased XP in 2005 when I assembled my first computer. I took advantage of the inexpensive Win8 Upgrade to purchase Win8 Pro which became Win8.1 and then Win10 Pro, all without further payment to MS.

I assumed that because I started by purchasing XP that I had a retail license and that this retail license would propagate through all of these upgrades, allowing me to change mobo's whenever I chose. In thinking more about it, I'm wondering whether the cheap upgrade to Win8 converted my license to OEM and this tech did me a favor by allowing the mobo change. Or, should he have made the license retail?

Bottom line is I think I now have an OEM license and don't understand whether it should be a retail license or I'm a cheapskate and should just buy a new Win10 Retail license when I next change mobo's.