Download Microsoft-windows-netfx3-ondemand-package.cab Fixed (2027)

Set it to and check the box that says Download repair content and optional features directly from Windows Update instead of Windows Server Update Services (WSUS) .

dism /online /enable-feature /featurename:NetFx3 /All /Source:D:\sources\sxs /LimitAccess Use code with caution. Replace D: with the drive letter of your mounted ISO. Troubleshooting Error 0x800f081f

After installation, check with PowerShell:

You likely missed a slash ( / ) before the command word. Download Microsoft-windows-netfx3-ondemand-package.cab

Link this script to a GPO under Computer Configuration → Windows Settings → Scripts → Startup.

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs Use code with caution. Copied to clipboard /LimitAccess : Prevents DISM from trying to use Windows Update. : Points specifically to where the file is located on your media. Microsoft Learn Method 2: Using "Turn Windows Features On or Off" (Online)

Press the Windows key, type cmd , right-click on "Command Prompt" in the search results, and select "Run as administrator" . Set it to and check the box that

Some prefer to specify the source folder instead of the exact file:

Once the process finishes successfully, restart your computer. You can verify that .NET 3.5 is now active. Alternative: Installing from Windows ISO

dism /online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs Copied to clipboard /LimitAccess : Prevents DISM from

When you attempt to install an older application, you will often encounter errors like or 0x800F0954 , which indicate that Windows cannot find the source files to finish installation. The solution is to point Windows to the exact source cabinet ( .cab ) file matching your operating system version. Error: 0x800f081f - Microsoft Q&A

If you get an error about the source, it means the CAB file is corrupted or the path is wrong.

For enterprise IT administrators, the CAB file is included in the original ISO images available from VLSC or the Microsoft 365 Admin Center.

Navigate to the official Microsoft Software Download page to get the media creation tool for your respective OS.