Can I Use One Windows License on Two Computers?

You can only install it on one computer. If you need to upgrade an additional computer to Windows 10 Pro, you need an additional license. Click the $99 button to make your purchase (the price might vary by region or depending on the edition you are upgrading from or upgrading to).

Can I use Windows key on 2 computers?

Yes, technically you can use the same product key to install Windows on as many computers as you want—one hundred, one thousandgo for it. However (and this is a big one) it’s not legal and you will not be able to activate Windows on more than one computer at a time.

What happens if two people use the same Windows key?

Technically it is illegal. You can use the same key on many computers but you cannot activate the OS to be able to use it for an extended period of time. That is because the key and activation is tied to your hardware specifically your computer motherboard. Technically it is illegal.