How does Win10 repair the system?

In the past, everyone repaired the system by entering safe mode, using Windows PE, or reinstalling the system. However, starting from Vista, we have a better way to deal with these problems, that is Windows Recovery Environment (referred to as: WinRE)! The following small series for everyone to explain in detail how to do this in Win10 system!
Win10 system Technology preview download: http://www.xp85.com/html/Win10P.html

[WinRE can do]
With WinRE, system restore, system image recovery, startup can be very convenient Repair and other operations; you can also restore the computer that can not run without losing the file, or even erase all the files and settings, initialize the entire system, similar to the effect of the system reload; can also be uninstalled to cause the system to crash Update patch. And WinRE will also be installed by default in the hidden partition before the system partition,
[How to boot to WinRE]
By holding down the "Shift" button and clicking on the Start menu in Win10, “restart” , you can enter the interface after rebooting; you can also start to WinRE by pressing the F8 button at boot time; if Windows fails to start due to failure, it will pop up the “Restore” interface, click on ““ Advanced repair options & rdquo; can enter.


[Example 1, how to use WinRE to uninstall the system update patch that caused the Win10 system error]
1. After entering WinRE, click on "Troubleshooting";

2. After entering, you will see the “Uninstall Preview Update” at the bottom, and then uninstall all system update patches. For the specific effect, please see the second picture below;


[Example 2, how to use WinRE to reinstall Win10 operating system]
1. Use U disk or CD with Win10 system image to start System, after the interface appears, click “Next”;

2. In this interface, click the “Repair Computer” option below;

3. Boot to WinRE interface After that, select the “Troubleshooting” and then you will see the new “Reinstall Windows Technical Preview using this media” option, click and install it;