Yes, you can use OEM keys purchased separately.
Yes, you can use OEM keys purchased separately.
I noticed some feedback mentioning removal options for certain purchases. The issue lies with OEM keys on prebuilt systems—they stay in place permanently after installation. Many users expect flexibility, but once a key is embedded, it can’t be altered or taken off. This explanation should clarify the situation.
It’s a straightforward approach since Microsoft tends to be forgiving if you start with a valid legal copy. Once you register, the key or license is tied to your system. But if you already have a login and password for MS, you can usually switch to a different PC and use the hardware change feature. Generally, Microsoft ignores this. I once purchased an authentic OEM installation pack with a working disk for a new build. On an Intel platform, I created a fresh PC using AMD and transferred the license there. If you do that, the old PC will appear unregistered. That’s about it.
EDIT: The OEM is essentially a legitimate discount version sold to system builders—anyone can apply for it, and many small PC makers offer them with included stickers inside the package. Bigger companies often just use the sticker, so you should be fine and won’t have to spend anything to try it.