You can reuse your windows activation key as many times as you wish. The activation key cannot be activated on two different computers at the same time.
How many times can you use a Windows 10 key?
You can only use a Windows 10 key once on a PC or laptop. If you need to reinstall the operating system for any reason, you’ll need to enter the key again.
Can you use Windows 10 key more than once?
Generally speaking, you do not have a limit on the number of times you can transfer a license as long as you deactivate the previous installation, so you’re not using the same product key on more than one system.
