After you file

When trying to download the tax file in my Windows 10 laptop I get a message that the computer runs Microsoft verified apps.  To get this app you need to switch out of S mode or find a similar app in the Store.  If I try to switch out of S mode it says I can't get back in.  I checked the app store and they want to charge me $9.99 for the TurboTax viewer.  HELP.