2FA shows application running on Windows 8 cannot login

So anything Windows 10 OS is restricted, unfortunately when I try to signin to offfice 365 account it takes me to our 2FA, and when I enter credentials it shows windows is out of date.  Please upgrade to windows 10.  Windows 10 is installed however its displaying windows 8.  This only happens logging in.  Administrator will not allow windows 8 and this only happens with your App during sign in.