Installing the Microsoft patch to the Windows 8 Store that enables installing Windows 8.1 Preview from the store worked very smoothly. When installed in this fashion it behaves as an update and leaves most MI and desktops apps installed and ready run. The down side is that the desktop environment has been been weakened, it seems to behave more like a MI full screen app then the Win7 environment. Norton 360 is not compatible, a Beta version of 360 will install but not all functions are functional and the IE version in Win8.1 will not install the Norton toolbar or several other packages that were enabled on the desktop version of IE on Win8. Battery Bar runs but does not report battery level or status, etc. and there is no battery icon on the taskbar It is obvious that the desktop has had its security behavior significantly changed some desktop apps may not access the internet as they did under Win8, isolation and communication between apps seems to have been tightened. My initial overall impression for my use is that there are limited improvements and some significant steps backward from Windows 8. Recovering Windows 8 may look at future release of Windows 8.1.