Windows 10 KMS Activation Servers

Basic technique

As it is spread over the Internet, open up a command prompt (Admin) by pressing Win + x, and then enter the following:

slmgr /ipk <you license key>
slmgr /skms kms.xspace.in
slmgr /ato

But then kms.xspace.in is dead.

Here are some alternatives:

kms.shuax.com
kms.landiannews.com
skms 3rss.vicp.net:20439
zh.us.to
skms.ddns.net

And then to clear KMS:

slmgr /skms localhost
slmgr.vbs /ckms

To get the license keys, you go ahead Google it..