That does clear up things a bit. Presumably, my copy of Windows will be upgraded but it won't be activated. Makes sense NOT to upgrade then. Though it would have been better if Microsoft prevented...

I have been offered the Build 1511[November Update] of Windows 10 Pro. My activation is KMS based, not MAK. I tried contacting Microsoft support[twice] and was told that the upgrade was possible but...

No, you didn't understand. I don't care about upgrading to Windows 10. I just want to know why Windows Update is showing Windows 10 Pro as available on a PC that has a unsupported copy of...

From school. They provide valid activations for Windows 7 and Windows 8.1 currently.

That is the problem, I don't have any issue with upgrading or anything. But, VL editions can't be upgraded in the normal way, why then am I getting the Windows Update notification to upgrade?...

I am currently running Windows 8.1 Pro VL[activated using the KMS mechanism used in organizations]. After updating my PC, the Get Windows 10 App came and Windows Update is also ready for downloading...