So it was my fault in the end! Thanks guys, now everything runs nicely, Bitlocker already crunches my drive and everything is all unicorns and rainbows. You guys have nice funny forum here, I'll...

Yes, I do have 1511 (10586) patch installed.
edit:\> 88975

So, this is how it looks after clicking the link 'I have a W10 Pro key.' and I'm still confused. Should it work or not?

edit2:\>...

OK, that's good idea, I will try phone activation. So basically, what I am trying to achieve should work, right?

Hello, this is the same as described, I tried both. I actually thought it's the same thing.

Hello, I was sure I would be able to use W7 Pro OEM key I have spare to upgrade my W10 Home to Pro (preinstalled OEM OA), but when I try to change product key in Settings> Updates> Activation, the W7...

halasz: Actually, that's not true at all. If you don't mind MBR (BIOS emulation), you just pop Windows DVD into drive and install them like on any other laptop. All drivers are available in Windows...

Hi, last few hours I spent trying to manually deploy Windows 10 on clean GPT disk but after applying image and rebooting I always end in unbootable state.

I manually setup drive like this:
...