Windows 10 installation on second hand PC

[AnastieByte]

Hi

I bought a used computer with genuine Windows 8.1 disk and number. The owner had taken advantage of the free W10 upgrade and that is what the PC is running all activated before the previous owner sold it to me.

I understand that because the upgrade will have registered the motherboard with Microsoft if I want to do a W10 clean install i just download the W10 from Microsoft, it will recognise the motherboard when I go to activate, check its database and all should be fine. Is my understanding correct?

Secondly, the PC has two M2 drives one with the operating system on, one foe games and I installed a third SSD drive. Before I do the above do I need to disconnect all the other drives and leave just one of the M2 drives connected. Or will W10 as me which drive I want to install the operating system to

All help appreciated
Cheers

 

[AnastieByte]

Thanks for this. Now a newbie question! When I reconnect the other drives will I need to wipe/format them or will they still work fine and I keep the data on them?

 

[AnastieByte]

Ok I did all of this and win 10 said can't install on partition 0. I ran disk clean in cod window same problem.

I removed both m.2 ssd and tried with a normal ssd to no avail same message and now I can't boot to bios. I took my standard ssd to my old pc and formatted it thinking it would help again I can't get to bios.

Any ideas?