Win8.1 failed to upgrade Win10 9879, what should I do if I get an error code?

A few days ago, Microsoft Win10 preview version was upgraded from Build 9860 to Build 9879. Many users who have installed Windows 10 Preview can't wait for the first time. Upgrade, but when some users try to upgrade, there is an error, unable to find the problem of the update.

This method provides a solution for users not detecting updates, and introduces Microsoft's upgrade push mechanism. However, many users still have error codes after checking the updates even after following the method. Unable to upgrade, users who encounter this problem are not a minority.

There are similar discussion topics in the Microsoft community, and Microsoft's official answerers have given the corresponding actions to solve this problem.

Firstly, users are advised to restore the registry key values ​​that have been changed, then restart the computer, and then try to upgrade again when the network is stable. This method is invalid. You can refer to the following methods.

▲Method 1: Rename the SoftwareDistribution folder

· Disable the Windows Update service in the service

· Open the C:\\Windows folder, then Right click on the SoftwareDistribution folder to rename it.

· Re-enable the Windows Update service after the rename is complete.

▲Method 2: Repair Windows components

Press the Win key+X at the same time, select the command prompt (administrator), and then enter the following command (you can also right click copy and paste) :

▲Method 3: Use the ISO image to upgrade directly to Win10 Preview Build 9879

Download the Win10 preview version of the 9879 Simplified Chinese Professional Edition ISO image. Then use the soft media virtual drive in the soft media cube to load the ISO image, enter the virtual drive and double-click setup.exe to upgrade and install.

At the same time, you can also use the soft media U disk to start the ISO image of Win10 preview version 9879 as a U disk boot disk, which is convenient for users to install or share with others.

In addition, regarding the space requirements for upgrading Build 9879, Microsoft officially stated that on some specific configurations, the driver installation may take up more than 20 GB of space, so it is recommended that users upgrade. Before, make sure that the C drive has at least 20GB of free space.