You cannot do much with android. Make phone calls and play video games on the phone and check the weather and stock prices. Oh and be tracked everywhere you go.
Windows 10 is the only one available for sale. Microsoft blocked Windows 7. Windows 10 is bland as can be and a jumble of dialog settings. One name and a bunch of updates.
No, https://www.outletpc.com/software---os-microsoft-windows-7.html (system builder i think), but see post 55