Windows CMD:

usage

            slmgr -skms <KMS domain>
            slmgr -ipk <GVLK>
            slmgr /ato
            

example

            slmgr -skms kms.022001.xyz
            slmgr -ipk M7XTQ-FN8P6-TTKYV-9D4CC-J462D
            slmgr /ato
            

GVLK:

1.Check your Windows version

2.Get GVLK Code => kms-client-activation-keys