VS2015 installation: Windows 10 SDK installation failure-2146889721, vs2015-2146889721

VS2015 installation: Windows 10 SDK installation failure-2146889721, vs2015-2146889721

If you encounter a Windows 10 SDK and Windows 10 Emulator installation failure when installing Visual Studio 2015 UWP, the system returns the hash verification failure with the error code-2146889721.

When the http://dev.windows.com/en-US/downloads/windows-10-developer-tools intends to download the independent SDK and Emulator for installation, it will also encounter hash verification failure can not download the installation.

Check whether you are using the Great Wall broadband. When CDN cache acceleration is set up in the Changcheng broadband intranet, the static resources you want to access are automatically redirected to the resources of its Intranet server, and the data of the Intranet cache instead of the source address is returned. For example, if you want to download Emulator, the correct is: http://download.microsoft.com/download/C/9/6/C96E2496-ECA0-4DED-B797-49CA96ABAA05/emulator/EmulatorSetup.exe

However, CDN returns the following address:

Http: // 211.162.127.2/files/415800000443ef34/latest

Therefore, when you visit a website that is frequently accessed by everyone, the speed is still good. However, this is not the real broadband, but the intranet of Great Wall broadband. In addition, when the resources you want to access are infrequently accessed, the speed will be very slow. Another point is that the Great Wall broadband CDN is very spam, and it is very slow to update some less accessed data. Therefore, when you install Visual Studio, the SDK and Emulator need to be installed online. Due to the Great Wall broadband CDN cache, the installer downloads some expired data, so the hash verification fails. The same is true if you use an independent installer, because they are all online Installation Tools, so they will also fail.

In this case, you can solve the problem through VPN. Unfortunately, you are using Great Wall broadband. Although you usually feel that the speed is good, it is a false Intranet speed, and the real exit speed is very low. Therefore, even if the VPN is mounted, the egress bandwidth limit will cause your webpage bandwidth to fail to be connected, not to mention the download.

Finally, cherish your life and stay away from Great Wall broadband.