.NET Framework Installation Error 0x800F081F

This 0x800F081F behavior could be caused during Microsoft .NET Framework installation due to various reasons ranging from Firewall security conflicts, network issues, incompletely installed Windows updates installation, and even conflicts with setup components.

Download the Diagnostic

There are certain situations when missing entries in your registry and registry corruption causes this problem. Try running a registry scan to identify if there are any such issues.

1. Click the button below to download and install the Diagnostic
2. Perform a Registry scan and fix any problems detected.
3. Restart your computer.

Estimated Download Time: 10 Seconds

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Uninstall Problematic Updates

Here is the list of well-known updates that might cause this issue. Try uninstalling them and then restarting your computer. This might fix the issue.

1. Press Windows Key + X.
2. Select Control Panel.
3. Click Programs.
4. Click View Installed Updates under the Programs and Features category.
5. Look for the following updates:
   • KB2966826, KB2966827 and KB2966828
6. Uninstall them one by one. (Right click > Uninstall)

Rename Software Distribution Folder

You might want to stop associated services and then stop the Software Distribution and other services.

1. Press Windows Key + X.
2. Select Command Prompt (Admin).
3. Execute the following commands:

Disable & Re-enable .NET Framework

A temporary glitch with the Microsoft .NET Framework can cause 0x800F081F error. Disabling and re-enabling this feature might solve the problem.

1. Press Windows Key + X.
2. Select the Programs and Features.
3. Click Turn Windows Features On or Off.
4. Select Microsoft .NET Framework 3.5
5. Click OK.
6. Re-enable the .NET Framework again.

Additionally, you may want to check for conflicts with Windows Features that prevent installation of .NET Framework.

Change Gpedit Settings

Group Policy Editor enables users to change the administrator policy settings with the use of Microsoft Management Console (MC) snap-ins.

1. Press Windows Key + R.
2. Type gpedit.msc
3. Click OK.
4. Expand the following node:
   • Local Computer Policy | Computer Configuration | Administrative Templates | System
5. In the right hand side panel, double click on Specify settings for optional component installation and component repair.
6. Select “Enabled” option.
7. Click OK.

Check Internet Connectivity

You may have network connection issues. Use the Network Troubleshooting utility to find and fix such issues.

1. Press Windows Key.
2. Type Network Troubleshoot in the Search Box.
3. Open Identify and Repair Network Problems from the Search Results.
4. The wizard will start detecting problems and fix them.

Change SXS Folder Security Settings

Make sure the SXS sub-folder in the .NET Framework directory has necessary read/ write privileges. Change the folder security settings.

1. Go to the Microsoft .NET Framework installation directory.
2. Double-click the Sources folder.
3. Right-click SXS, select Properties.
4. Click the Security tab in the new dialog, and then click the Edit button.
5. Check-up all the boxes under the Allow column.
6. Click OK | OK.
7. Type CMD in the Search Box on your Taskbar.
8. Right-click Command Prompt, select Run as administrator.
9. Execute the following commands:
   • dism /online /enable-feature /featurename:netfx3 /all /source:c:\sxs /limitaccess
   • dism /online /Cleanup-Image /RestoreHealth