Need help install win10

[KeyboardZZ]

Hello everyone

Does anyone know how can I upgrade my pc to windows 10 free without the product key because every time when i try to install media creation tool I don't get that message 'don't have let's. Am installing windows on my dad's old pc that still runs win 7 and i need win10 because i got ryzen cpu and my mouse and keyboard  stop funtioning on win 7.

[C2dan88]

On the screen it asls for a key there should be clickable text that says "I dont have a key". (It wont be a physical button, but a text link).

[LogicalDrm]

You can try to activate with Win7 key. It's been working like that for a while now.