Net framework 3.5 installation error 0x800f081f windows 11

If you're experiencing a .NET Framework error, it's a good idea to check for and install any pending Windows updates.


Getting error codes 0x800F081F or 0x800F0906 while trying to install .NET Framework 3.5 on your Windows 10 and 11 PC? Normally Windows 11 and 10 come with preinstalled net framework 4.5 and 4.6. But Applications Developed with .Net framework 3.5 don’t run on Windows 10 and 11 systems until you install .net framework 3.5 on your system. Well, Net Framework 3.5 installation error 0x800f081f indicates a problem with the source files required for the installation. Internet Connection Issues, Third-Party Interference or Incomplete or Corrupted Windows Installation are common. Here is How to Fix Error Code 0x800F081F When Installing .NET Framework 3.5.

Windows Couldn’t Complete the requested Changes. Couldn’t find required files to complete the requested changes. Make sure that you’re connected to the internet and click ‘Retry’ to try again. Error code: 0x800f081f or 0x800F0906.

How to Fix NET Framework 3.5 installation error

Encountering errors during the installation of .NET Framework 3.5 can be attributed to various factors.

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  • One of the primary reasons for installation errors is the absence or corruption of the necessary source files required for .NET Framework 3.5. This can occur if the system is unable to locate these files locally or download them from Windows Update.
  • A stable and active internet connection is crucial during the installation. If the system needs to download files from Windows Update and there are connection issues, it can result in errors.
  • Issues with the overall integrity of the Windows operating system, including corrupted or missing system files, can impede the installation of .NET Framework 3.5.
  • Antivirus or security software can sometimes interfere with the installation process, incorrectly flagging the installation as a potential threat and preventing the completion of the process.
  • Conflicts with other third-party applications installed on the system can disrupt the installation. Temporarily disabling or uninstalling such software may resolve compatibility issues.

How to enable Net Framework 3.5

You can enable .NET Framework 3.5 using the Windows Features, which is a common and straightforward approach.

  • Open Control Panel > Programs > Programs and Features->Turn Windows Feature On or Off.
  • In the Windows Features window, locate “.NET Framework 3.5 (includes .NET 2.0 and 3.0)” and check the box next to it.
  • Click “OK” to start the installation process. Windows will enable .NET Framework 3.5, and you may need to wait while it completes the process

Ensure that you have a stable internet connection during the installation.

If you have a third-party antivirus or firewall, temporarily disable them during the installation.

After the installation is complete, you may be prompted to restart your computer. Ensure that you save any open work and restart the system.

Enable net Framework 3.5 Feature

But, If the error code repeatedly bugs you, you will need to take steps to remove it. Here are some applicable solutions for the error code you are encountering.

Install Windows updates

When you encounter the error code 0x800F081F or 0x800F0906, you should first check for Windows update and install all available updates. Windows updates often include fixes and improvements that can address issues related to various components, including the .NET Framework.

  • Open the settings app using the keyboard shortcut Windows + I,
  • Click on Update & security then Windows update
  • Here hit the check for the update button to download and install the latest Windows updates.
  • Restart Windows to apply the updates, and again try to install .NET framework from programs and features.
  • Hopefully, this will fix .NET framework installation error 0X800F081F.

Tweak on Group Policy Editor

If you are a Windows 10/11 pro user then you can Tweak or configure group policy to get rid of the error you are encountering while installing .NET framework. To do it, Open the start menu, type gpedit.msc and hit enter. It will open the Windows Group Policy editor.

Note: Skip this step if you are a Windows Home Basic User, Fallow next solution to get rid of this NET Framework 3.5 installation Error 0X800F081F.

  • Here on the group policy editor window from left pane navigate to
  • Computer Configuration -> Administrative Templates -> System.
  • Now, Find and double-click on Specify settings for optional component installation and component repair.
  • Then, Mark Enabled and click on OK.

Restart Windows to apply the policy and take effect the changes Now, Try to install .NET Framework 3.5. hope, You won’t face any problems again.

Tweak Group Policy Editor to fix error 0x800F081F or 0x800F0906

Enable .NET Framework Using DISM Command

If the above methods fail, you can try to enable NET Framework 3.5 manually by using the DISM command.

  • To do this first Download
  • Next copy the Downloaded file to Windows installation Drive (C: Drive ).
  • Then open Command Prompt As an administrator, type the command below And press enter to execute the command.

Dism.exe /online /enable-feature /featurename:NetFX3 /source:C:\ /LimitAccess 

Enable .NET Framework 3.5 Using DISM Command

Command explained 

  • /Online: Target the operating system you’re running (instead of an offline Windows image).
  • /Enable-Feature /FeatureName :NetFx3 specifies that you want to enable the .NET Framework 3.5.
  • /All: enables all parent features of the .NET Framework 3.5.
  • /LimitAccess: prevents DISM from contacting Windows Update.

Wait until 100% complete the Command, After that, you will get a message The Operation Completed Successfully. Close the Command prompt and Restart windows to get a Fresh Start. That’s all you have successfully installed .NET Framework 3.5 on your Windows 10, 8.1 PC.

Run System File Checker Utility

Sometimes corrupted, missing system files also cause different errors while installing or running applications, Including NET Framework 3.5 installation Error 0X800F081F. We recommend Run the System File Checker Utility which scans for missing, system files.

  • First Open the Command Prompt as Administrator,
  • In the Command Prompt window, type sfc /scannow and press Enter
  • This command will initiate a scan for corrupted system files.
  • If found the SFC utility restores them from a special folder located on  %WinDir%\System32\dllcache.
  • The scan may take some time to complete. Do not interrupt the process.

If the SFC scan doesn’t resolve the issue, you can also try the Deployment Imaging Service and Management Tool (DISM) to repair the Windows image:

DISM /Online /Cleanup-Image /RestoreHealth

Once 100% scanning is complete, restart your PC and Again try to Enable .NET Framework Using DISM Command with the source file option.

Also read

Steve Ballmer
Steve Ballmer
With over 7 years of experience in the IT industry, I have experience in IT support, helpdesk, sysadmin, network admin, and cloud computing. Certified in Microsoft Technologies (MCTS and MCSA) and also Cisco Certified Professional in Routing and Switching.

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