Error when installing Microsoft .NET Framework, Return Code: 0x800f081f - Security Center

Security Center Installation and Upgrade Guide

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Security Center
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Guides > Installation guides
Security Center
Installation guides

If your Security Center installation on a Windows 10 machine is interrupted with the return code 0x800f081f, you must use your Windows 10 installation disk (or a virtual copy of it) to turn on .NET Framework 3.5, and rerun the Security Center installation.

What you should know

Security Center requires the feature .NET Framework 3.5 to be turned on in order to work. Security Center installer turns .NET Framework 3.5 on by default. However, this feature cannot be turned on if you are missing the .NET 3.5.1 files, which causes the error 0x800f081f.


  1. Get a copy of the Windows 10 installation disk (or a virtual copy of it) from your IT department, and make sure it is accessible from the computer where Security Center needs to be installed.
  2. Open a command prompt with full administrator rights.
    For more information, see Windows 10: Elevated Command Prompt.
  3. Enter the following command:
    DISM /online /enable-feature /featurename:NetFx3 /All /Source:F:\sources\sxs

    where F: is the drive letter where the installation disk or virtual disk with the Windows 10 setup files are located.

    The command prompt will run through a repair and activation of the .NET framework feature.

  4. Close the command prompt.
  5. From the Windows Control Panel, open the Programs and Features applet and click Turn Windows features on or off.
  6. In the Windows Features dialog box, click .NET Framework 3.5, and then click OK.
  7. Rerun the Security Center installation.