I've researched this but have a bit of a unique situation. I am running windows 7 on a SATA2 SSD but I plan to upgrade to a PCIe SSD when I install Windows 10. Up until now I thought I would have to spring for a new OEM windows 10 disk, however I wonder if this will work? To be clear I am not trying to dual boot.
So say I get Windows 7 all happily updated on my old SSD and I get the magic Windows 10 upgrade notification icon. Then I install my fresh new PCIe SSD and reboot.
I will be booted into Windows 7 with a new, unformatted (but recognized) new drive while running Windows 7 on my old drive.
If I start the free upgrade process, will it let me choose that new drive as my installation location for Windows 10? Or does that break the rules of changing something in the system....
Thanks for any thoughts.