Windows 10: How to Swop Win 10 Pro to my Win 10 Home laptops

I have just bought a new Acer Nitro 5 laptop with Windows 10 HOME on it. My OLD HP laptop has Windows 10 PRO.Is there any way to transfer/swop the licences over WITHOUT a full Re Installation so my New laptop has the Windows 10 Pro ? They are BOTH signed into my Microsoft acct. Thanks

:)

 

Win 10 boots...

I have even on an old dell laptop from windows xp era: Windows 10 adventures

 

Win 10 boots...

Interesting that it works on that oldie but goody laptop.

I don't notice any speed lags with Win-10 TP, but I'm using it on an i5-4670K system with an SSD for the boot drive, so it's snappy.

 

Fresh Install of Win 10 without Serial Key?

Looking to reformat a laptops HDD, and then reinstall Win 10 fresh. The problem is it came pre-installed with Win 8 and I did the free upgrade to Win 10. How exactly would I re-format the HDD, reinstall Win 10 and ensure it reactivates properly? I don't see a Win 8 serial key anywhere in the contents of the box.