You can install Win10 on multiple machines using a single key press.
You can install Win10 on multiple machines using a single key press.
You can install Win10 on up to several machines with a single key. Currently you've set it up on two computers, but there are more available, including some still running WinXP. If you reach a limit like five, selling one machine allows you to remove it from your list and install the new one on another device.
The limit is likely around one, and both of your current setups might fail if the key isn't correct. It's probable that Microsoft chose to move away from this version to reach more users on Windows 10.