Salvage Win10 Home, upgrade to Pro

Hello Great Group,

I am interested in steps I might take to salvage my Windows 10 Home license from a dead computer's drive, then upgrade to Pro on a new computer. Is this possible? If so, how?

Details: 'Puter hanging issue became fatal, then died, I borked the BIOS, made a mess, building a new machine and plan to harvest as much as possible from the old drives. I have a backup of C: where Win10 lived as well as two identical SSDs (both with Win10 on them), yet do not want to boot from one of the old disks fearing that 1) Windows may be corrupted, or 2) The drive might have some nasties on it.

Upgrading from Home to Pro is about $100? cheaper than just buying Pro. So, I'd like to upgrade from the old license if possible, but I'm not sure what steps to take and in what order in order to accomplish this mission.

Are these the correct steps? (I'm guessing)

Build the new computer
Update BIOS if necessary
Install Win10 Pro without key
Attach old drive
Scan old drive with Malwarebytes
Run Belkin Advisor on that drive to reveal key?
Enter key into Pro?

I've no clue what might happen at this point. Key invalid? Upgrade to Pro somehow?

Thanks in advance for your insight.

Thank you dalchina. The old offer led to a 404 page, yet the site had a good deal for Home for $60.
(I decided that I did not need any of the Pro features)

Again, thanks

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