I have a brand new Windows 10 laptop.
After various issues with Windows Mail app (probably another question), I uninstalled it to reinstall.
When I went to the store to get it, the install button was greyed out and a message told me I had to upgrade windows before I could install Mail. I went to Windows updates and apart from a couple of KB updates no other updates were indicated.
Presumably I need to get a later version...which one? I do not need the Pro version.