Win8.1 Update downgraded to Win8.1 operation step

In the latest win8.1 2014 update incorporates a feature, the upgraded system can be downgraded to win8.1, further improved win8 upgrade win8.1 can not be downgraded The question, then how is this downgrade operation implemented? Let's take a look at the specific steps.
1, first enter the control panel of the Win8.1 2014 Update system, and then click to enter "Windows Update" option
2, enter the Windows update options interface, we then click on the left menu “ View update history”
3, then we will open the middle of the view of the update history page, click to enter “installed updates 
4, finally we just find two of our previous upgrades Upgrade files: KB2919355 and KB2919442, you can uninstall them all.


5. After the uninstallation is completed, we restart the computer and the system will be restored to the Windows 8.1 version.
From the above specific operation, as long as the two upgrade files in the system are uninstalled, the system can be restored to the previous win8.1 operation interface. The steps are actually very simple, as long as the user finds these two files. There is nothing difficult.