So, most windows installations come with an OEM key because it came pre-installed. OEM keys, last I knew, don’t have this support, because the manufacturer is responsible for that.

If you bought a lenovo laptop, its on lenovo.

But anyone has been able to buy windows directly with a standard license key and windows supports those computers directly. I’ve never bothered to use it but I worked with people who did and (again, last I knew, some 10+ years ago) they got someone with a thick accent reading from some support article who didn’t know what they were about.

But they could call. Technically that’s support.