SQL Server 2012 Installation SQL2012 error occurred when Windows feature NetFx3 was enabled

In the process of installing SQL Server 2012 on a Windows Server 2012 server, an error was reported, an installation failed,

During the installation of SQL 2012, the following error occurred: An error occurred while enabling Windows feature NetFx3, error code:-2146498298. Try to enable Windows features NetFx3 from Windows Management Tools, and then rerun Setup. For more information about how to enable Windows features, see http://go.microsoft.com/fwlink/?linkid=227143

Looked up a lot of information, found that there is a method, after testing, can be used.

The workaround:

1. Locate the Windows Server 2012 installation disk, such as the ISO file, to suspend it on the drive.

2. Open Window PowerShell and the administrator runs the following command:

Import-module Servermanager
Dism.exe/online/enable-feature/all/featurename:netfx3/source:d:\sources\sxs

(where Source:d:\sources\sxs, refers to the system drive installation disk path)

After 10 minutes, wait for the operation to complete, restart the system, and then reinstall SQL Server 2012 to install successfully.