New
#230
When I signed up for the Windows 10 Preview it installed the Enterprise version & I've updated successfully to build 10240 which have, from memory, always required a product key to successfully register; this was running on a different HD to my Windows 7 Pro SSD.
When Windows 10 was released, I upgraded on SSD from Windows 7 Pro to Windows 10 Pro & then did a clean install.
On my 2nd HD Windows 10 Enterprise build I updated from build 10240 (Activated) to build 10532 which is now asking me to activate.