Yes, you can add a new retail key to an existing activated system, and it will work for future use on a PC.
Yes, you can add a new retail key to an existing activated system, and it will work for future use on a PC.
I have a Windows 10 Pro laptop with a digital retail key tied to my Microsoft account. I found a local seller offering a 25-character key at a good price, but only a small stock remains. I need it quickly since my parts are arriving soon. I want to buy it now and verify if the key works on my PC. If I activate it immediately, can I use this same Microsoft account with another key to unlock a different Windows 10 Pro installation for my new laptop after a week or two? Does this approach function as intended?
There is a good chance it's not actually a retail key but rather one bought in bulk not intended for re-sale, in which case the internet is flooded with them. If your worried about it being a legitimate key, you should buy it from a Authorized seller such as Microsoft, where you will obtain a actual proof of purchase, which is currently $200 USD.