Can you use already activated windows 10 key from old pc?

[Shoxzie]

I have recently bought new pc and would like to use windows 10 key from my old pc. Do i have to deactivate it somehow first on old pc or i can just reuse it on a new one?

 

[Colif]

If you no longer plan on using old PC, you can do this on it first and then follow same link on new PC to move licence

Reactivating win 10 on new hardware