You can transfer Windows 10 license only once if it was upgraded from a retail version of Windows 8.1 or before<br>Windows retail license bought directly from open market channels like eCommerce sites can be transferred as many times as you like because, well, you paid a premium price for it<br>OEM Windows 10 licenses, the ones that come pre-installed on your laptop when you bought it, are non-transferable<br>If you used Easy Upgrade, you can transfer Windows 10 license using Digital Licensing