Window 10 Product Key Reuse - Microsoft Community

hi. need replace hard drive of laptop have clean windows 10 installation fresh hdd.

questions:

1. can reuse window 10 product key?

2. can see window 10 product key?

also, workstation window 8.1 machine meaning i'am using upgraded window 10 version.

there no need reuse product key.

when upgraded previous version of windows or receive new computer preinstalled windows 10, happened hardware (your pc) digital entitlement, unique signature of computer stored on microsoft activation servers. windows 7 or windows 8 genuine license running exchanged diagnostics key.

anytime need reinstall windows 10 on machine, proceed reinstall windows 10. automatically reactivate.

there no need know or new key, if have issues digital licensing or activation troubleshooter, can utilize existing windows 7 or windows 8/8.1 product key you ownto reactivate if necessary. or use reset function in windows 10.

if prompted enter product key, click 'i don't have key' , 'do later'

review: how to: perform clean install of windows 10

and

review: activate windows 10 license via microsoft chat support

Windows / Windows 10 / Install, upgrade, & activate / PC