Something was optimized desktop application. This was very good even in Windows 7 and it there safely suspend also little. Some comfort features have been added. On the Desktip Like Windows 8 also very good, is fast and has little error. (Quasi is the desktop now an app. Who came up with that.)
Problem is rather the new Start menu. This did not go. Incidentally, it is pointless anyway, all these tiles are not comfortable and the apps are nonsensical. They have sometimes fewer features than the desktop application that use is cumbersome and if you do not find certain issues espionage operations instead. An example: In the Skype app can I register with my "Windows ID". In the desktop application that virtually anyone sitting at the PC. If there are several users already an important thing. In addition, the mentioned functions is significantly larger in the desktop application.
The question remains why the PCUSER this "feature" Kachelsartmenü imposed. After all, my PC is not a tablet.
Innovation may also have negative effects. After all, Microsoft has a stable operating system, which manages well without these frills. I know almost none of these tiles used on the PC. Microsoft has always built irgendwleche seemingly "innovative" things with every new Windows a nobody needs and uses.
After upgrading to Windows 10 will be probably free (or very cheap). Since the Classic Start menu is back to play a more important role.