>Install legit copy of windows 10 home.
>Use it for a while, download ear trumpet for free from the app store because no login required and I need a better per-app audio mixer.
>Switch to free as in public toilet linux
>Switch to hackintosh macos mojave
>Back to free as in toilet
>Back to windows 10
>At this point the drive including efi partitions have been wiped numerous times.
>Windows 10 remembered that I downloaded ear trumpet before. I'm on a vpn too so the ip was never the same as old usage.
So it's that thing where they tie your hardware in to authorize the windows 10 copy obviously, but I didn't know it also tied into the store. And it's especially weird that it remembers your downloads even if you've never had a microsoft account in your life.