Do I need a new Windows license after changing my motherboard?

If you do get that activation watermark and can't activate with your old key, you may have to buy a new license from an authorized retailer or Microsoft directly. Just make sure you check if your Microsoft account is linked to your license; that might help with transferring it.

I recently upgraded my motherboard from A320 to B550 without any problems. I was worried about my OEM key, but I didn't encounter any watermark or activation issues. If everything is working smoothly now, you might not need to stress about it unless you plan to format the system later.

From what I've seen, logging into your Microsoft account on the old PC before swapping hardware could make the transition easier. If you get activation errors, you just need to inform Microsoft about the hardware change, and they should help you reactivate your license pretty quickly.

It really depends on the type of Windows license you have. If it's a retail key, you should be fine to transfer it to the new motherboard. However, if it's an OEM key, it's generally tied to the old hardware and won't transfer. If your old key doesn't work, contacting Microsoft might be your best bet—they can help you out with the activation issue.

If you built the PC yourself, the license might transfer without any problems. Just try entering your old key again. But if the PC came pre-built, you might be stuck with an OEM key which is not transferable. Keep that in mind when changing your hardware.