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Installing Lab 50 on Windows 8

Installing the .NET Framework 3.5 on Windows 8

The .NET Framework 4.5 is included with Windows 8 and installed on your computer with the operating system. However, the .NET Framework 3.5 is not automatically installed with Windows 8. Before installing Lab 50, you must enable version 3.5 on your computer.

Installing a Windows language pack on Windows 8 before installing the .NET Framework 3.5 will cause the .NET Framework 3.5 installation to fail.
Install the .NET Framework 3.5 before installing any Windows language packs.

Enabling the .NET Framework 3.5 (Online Computer)

This option requires an Internet connection. In Control Panel, choose Programs and Features, choose Turn Windows features on or off, and then select the Microsoft .NET Framework 3.5.1 check box.

Enabling the .NET Framework 3.5 (Offline Computer)

If you cannot connect to the Internet, you can enable the .NET Framework 3.5 by using the Deployment Image Servicing and Management (DISM) command-line tool and specifying the installation media (ISO image or DVD) you installed Windows 8 from.

  1. In Windows 8 or Windows Server 2012, open a Command Prompt window with administrative credentials (that is, choose Run as administrator).

  2. To install the .NET Framework 3.5 from installation media located in the D:\sources\sxs directory, use the following command:
    DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:d:\sources\sxs{color}


If installing the .NET Framework 3.5 in Control Panel fails, you may get one of the following error messages:

  • 0x800f0906: “Windows couldn't connect to the Internet to download necessary files. Make sure that you're connected to the Internet, and click Retry to try again.”
  • 0x800F081F: “The changes could not be completed. Please reboot your computer and try again.”
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