Reuse Windows 10 key on same computer after reinstallation?

I completely format my laptop and reinstall win 10. Win 10 is currently activated (free upgrade from win7). Can I reuse the old key after the new installation? Somehow there are OEM keys and what do I know, some are reusable, some are not…

Once Windows 10 was activated on your device, it means that Microsoft only saved a special hardware key that matches your device. This means that after installing Windows 10, the activation takes place independently. It is only important that you choose the suitable Windows version used so far.

Thank you.

Assuming that I bought a Win 10 Key, I can use it every time I set up / reinstall my PC. - Of course, only for a PC and not for the entire relatives and all neighbors.

You can enter it during installation. You can also install it as a test version, which theoretically only runs for 30 days. Only if the computer is online during installation does the activation take place immediately.

At least if everything goes according to plan. But with computers I have given up planning. 😄

Only if the computer is online during installation does the activation take place immediately.

As a demand, is it not tied to the MS online account? Or is it generally deposited with MS? You should remove the computer from your online account when changing or selling hardware… If you only use local registration, could there be any problems? I have an online account and it definitely works… I'm just not sure how it is with local accounts…

Yes, of course you can continue to use your key after the installation. And the best thing: Even after the new installation, you don't even have to enter the key again.

For the new installation you just have to click "I don't have a key"

As soon as Windows connects to the Internet, it is recognized that it is the same PC and Windows activates itself.

Yes! - However, the product key no longer needs to be entered when re-starting.

Before it is activated, it is always saved. If a hardware change occurs, then they have a really great activation by phone. I had to take it twice.

I don't think they would do themselves a favor if they only monitored devices for this type of multiple installations that were only linked to an online account.