Upgrade from 8.1?

Have a clients PC needed new hard drive.
Had the upgrade from 8 to 10 on the old.
Installed the 8.0 from the recovery USB.
Can I do a upgrade back to 10 and, if so, how???
Pete

Run setup.exe from the Windows 10 installation ISO file, USB flash drive or DVD:
Download Windows 10

You could also have just started with a clean install of Windows 10 and not bothered with Windows 8.

Thanks, Navy,
I wasn't sure that the Product Key was baked in on an original Windows 8 PC.
Obviously it is since it worked like a champ.
Pete

cfourkays said:

Thanks, Navy,
I wasn't sure that the Product Key was baked in on an original Windows 8 PC.
Obviously it is since it worked like a champ.
Pete

Windows 10 will either detect the Windows 8 product key and just use that to activate with - or it will just activate itself from the digital license already stored on Microsoft activation servers for that computer.

It did.

Win10 should be able to activate after upgrading directly from win8 to win10

I'll repeat.
It did!