"Error enabling Windows feature NetFx3" (Error cause, detailed analysis and resolution) and detailed analysis and installation procedures for installing the. NET Framework 3.5 on Windows Server2012 during the installation of SQL Server 2012

questions: During the installation of SQL Server 2012 on the server (operating system Windows Server 2012), the installation stays on the interface shown, and the prompt box appears with "Enabling operating system features NETFX3". Notifies you that an error occurred while enabling Windows feature NetFx3.

Analysis : NetFx3 refers to the. NET Framework 3.5,sql Server 2012 database system that runs on the. NET Framework 3.5, but Windows Server2012 by default, the. NET Framework 3.5 is not installed, so to successfully install SQL Server2012 you must first install the. NET Framework 3.5 on the operating system. The steps to install. NET 3.5 on Windows Server 2012 are as follows:

First, open Server Manager and select Add roles and features.

Ii. (to save space, omit a few steps here) in the Features tab, tick ". NET Framework 3.5". Click "Next", Go to "Confirmation" tab, click "Install":

Issue: the installation failed and the source file was not found, as shown in:

Analysis: earlier on Windows Server 2008, if you are installing ". NET3.5 ", only through the" Add and remove "feature, the Windows Server 2008 system disk or system image contains the". NET Framework 3.5 "component files, which are in the system disk or system image in the \sources\sxs directory , these component files are copied to the new system when the system disk or image is installed for the server, but they are not installed automatically, and can be completed by the "Add and remove" function when manually installing the components for the operating system, without having to download the relevant components over the Internet. However, some subtle changes have occurred on Windows Server 2012, and the Windows Server 2012 system disk or system image also contains the ". NET Framework 3.5" component files, but when you install the system for the server, These component files are not copied to the newly installed system, so installing the. NET Framework 3.5 for the system must be plugged into the system disk or loaded into the optical drive, using the. NET in its Sources\sxs directory Framework3.5 installation files for installation, the following steps (note: To ensure that the installation is successful, do not download the. NET Framework 3.5 installation files directly on the Web for installation, and the system version inserted in the system disk or loaded system image is the same as the system installed on the server, in order to avoid the installation failure due to the incompatibility between the. NET Framework version 3.5 and the system version, I have failed several times:

One, load the Windows Server2012 system image into the virtual CD-ROM, and view the corresponding disk symbol (I loaded the system image disk symbol is G, and you can see the installation files of the. NET Framework 3.5 components in the G:\sources\sxs directory)

Open Server Manager, add roles and features, and on the Confirmation tab, tap specify alternate source path and enter the path to the installation file for. NET Framewok 3.5 In the path of the popup form (my G:\Sources\sxs)

After you install the. NET Framework3.5 successfully, the SQL Server2012 can continue to install.

Add:

In addition to installing through the GUI above, there are several ways to install:

1. Install using the PowerShell tool (Microsoft strongly recommends that system administrators use powerful PowerShell to manage the system), specify the source file path , and then install it:

Install-windowsfeature net-framework-core–source G: \sources\sxs

2. Use the DISM command at the command prompt to specify the source file path and then install it:

dism/online/enable-feature/featurename:netfx3/source:G: \sources\sxs

3. Specify the shared path using the file share containing the SxS folder:

Install-windowsfeature net-framework-core–source \\ServerName\ShareName\sxs

Description: My. NET Framework3.5 installation file is located on the drive letter G, should be modified according to their own circumstances. The third way is to use the. NET Framework3.5 installation files that are shared on someone else's computer for installation, so the \\ServerName\ShareName\sxs of the third command This part needs to be entered according to the actual shared path.

The SQL Server 2012 installation process is detailed (how to set each step and why) please refer to my other blog post : http://www.cnblogs.com/EastLiRoar/p/4051969.html

October 26, 2014 14:58:20

An error occurred during Windows feature NetFx3 during the installation of SQL Server 2012 (cause of error, detailed analysis and resolution) and detailed analysis and installation procedures for installing the. NET Framework 3.5 on Windows Server2012