Win10 how to return to the previous Windows version with one click

The Win8 market launched by Microsoft is sluggish, and it is urgent for Win10 to save the market. Therefore, it cooperates with China's Tencent and 360 to provide one-click upgrade to Win10. But Microsoft is not a rib. They consider the retreat. If users feel that Win10 is not good, they can return to the previous version of Windows with one click. How to operate?
At the WinHEC 2015 conference in Shenzhen, I showed a new version of the Win10 preview version of the future version of "Set/Update and Restore/Restore". Go back to a previous version of Windows Go to the previous version of Windows) & rdquo; function. Figure:

This new feature of rolling back the Windows version is under the original "Restore" & "Reset" function.
From the English below this function, it can be seen that returning to the previous version will not lose the user profile. Microsoft's behavior is also very responsible. Microsoft now feels that charging is not the most important issue. It is more important to snatch the market, and all efforts must be made.