Why Have Most Windows 8 Users Not Upgraded to Windows 8.1?. I know that a lot of you have bought new computers with Windows 8, or have upgraded to Windows 8. However, given that the fixes in Windows 8.1 are free, why haven't you upgraded? You have to go to the Windows Store and get it; so, that may be it. It won't come automatically with Windows Update. But, it greatly increases the speed and stability of Windows 8, and you will have to have Windows 8.1 to update to to the next version. So, get over to Windows Store, and get Windows 8.1. Don't make me come over there.