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Table of Contents
1. Use the DISM command to add local source
2. Check system updates and component storage health status
3. Skip the download process when enabling the function
4. Make sure Windows Update is running normally
Home Common Problem How to resolve .NET Framework 3.5 installation error 0x800f081f?

How to resolve .NET Framework 3.5 installation error 0x800f081f?

Jul 11, 2025 am 12:49 AM

The solution to encounter the .NET Framework 3.5 installation error 0x800f081f is as follows: 1. Use the DISM command to add a local source, mount Windows installation ISO and run the specified command to obtain files from the local area; 2. Check the health status of system updates and component storage, and repair the core system files through SFC and DISM tools; 3. Skip the download link when enabling the function, and disable network download through Group Policy; 4. Ensure that Windows Update is running normally, restart the related services and clear the software distribution folder. These methods can effectively resolve errors caused by network problems, system corruption, or lack of installation sources.

How to resolve .NET Framework 3.5 installation error 0x800f081f?

.NET Framework 3.5 installation error 0x800f081f is encountered, usually because the system cannot find the required installation file or some system components are corrupted. This problem is more common in Windows 10, Windows Server and other systems. Here are some practical solutions that can help you quickly locate and fix this error.

How to resolve .NET Framework 3.5 installation error 0x800f081f?

1. Use the DISM command to add local source

The most common reason is that the system cannot download the required files from the Microsoft server. You can manually specify an installation source (such as system image or installation disc) to solve this problem.

Operation steps:

How to resolve .NET Framework 3.5 installation error 0x800f081f?
  • Mount your Windows installation ISO file.
  • Open a command prompt (administrator permissions) and run the following command:
 dism /online /enable-feature /featurename:NetFx3 /All /Source:D:\sources\sxs /LimitAccess

Note: D:\sources\sxs here should be modified according to the ISO or CD path you mounted.

This allows the system to directly obtain the installation files from the local area, bypassing the problem of network request failure.

How to resolve .NET Framework 3.5 installation error 0x800f081f?

2. Check system updates and component storage health status

Sometimes corruption of system files can also lead to this error. System files can be checked and repaired using SFC and DISM tools.

It is recommended to execute the following command:

  • Scan the system files:

     sfc /scannow
  • If the problem is not solved, try to fix the component storage:

     dism /online /cleanup-image /scanhealth
    dism /online /cleanup-image /restorehealth

These commands scan and repair the core system files to ensure that the system environment is in a good state.


3. Skip the download process when enabling the function

If you don't want to mess with the local source, you can also use Group Policy or Registry settings to prevent the system from trying to download the installation package online.

How to operate:

  • Open the Group Policy Editor (gpedit.msc).
  • Enter path:計(jì)算機(jī)配置→ 管理模板→ 系統(tǒng)→ Windows 更新.
  • Find Always Get Updates Beyond WSUS from Windows Update, and set it to Disabled.

This prevents the system from getting stuck without the available update server.


4. Make sure Windows Update is running normally

Sometimes there is a problem with the Windows Update service, which makes it impossible to download the necessary files.

You can try:

  • Open Service Manager (services.msc)
  • Find Windows Update Service
  • Right-click to select "Restart"
  • If the service is disabled, change to "automatic" startup type

In addition, clearing the software distribution folder is also helpful:

 net stop wuauserv
del %windir%\SoftwareDistribution\*.* /q
net start wuauserv

Basically these common ways of dealing with it. Error 0x800f081f is most likely not a big problem, but you need to patiently check the cause. The key is to figure out whether it is a network problem, a system file corruption or a lack of the correct installation source.

The above is the detailed content of How to resolve .NET Framework 3.5 installation error 0x800f081f?. For more information, please follow other related articles on the PHP Chinese website!

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