However it's still installing Windows 10 Home. I then downloaded an All-In-One ISO image of Windows 10 from MSDN (of which I have limited access to), transferred the installer onto a USB stick, & reinstalled (a clean install again).
I'm guessing this is due to the Windows 8 Standard Edition serial key preinstalled in the BIOS. I bought Windows 10 Professional & completed a fresh-install (complete reinstallation) of Windows, only that it installed Windows 10 Home instead of Professional.
When the laptop still had its hard drive, I upgraded it to Professional so I could use the resources provided by the domain on my homeserver because of this, I can only use the Professional editions of Windows (Home can't join domains). My laptop (a Lenovo Flex 2 15) came preinstalled with Windows 8 Standard (with the serial key preinstalled into the BIOS), and I've since installed an SSD (a Samsung Evo 840 120GB) & upgraded to Windows 10.
