Download Microsoft-windows-netfx3-ondemand-package.cab !full! Link

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs

: Right-click the downloaded ISO file and select Mount . It will appear as a new drive letter (e.g., D: or E: ). Download Microsoft-windows-netfx3-ondemand-package.cab

Using this CAB file allows you to install .NET 3.5 or in air-gapped environments. Even with the correct

Even with the correct .CAB file, you might occasionally run into issues. Here are the most common snags and how to overcome them: 1. Error: 0x800F0954 Error: 0x800f081f - Microsoft Q&A execute the following command

: Ensure the netfx3 CAB file is from the same Windows version (e.g., 22H2) as the running system 1.2.4 .

No. That is a Windows update, not the base .NET 3.5 on-demand package. The base CAB does not contain “KB” in the name. Search again carefully.

: In the command prompt, execute the following command, being careful to use the correct path to where you placed your CAB file. Replace C:\sxs with your actual folder path.