Microsoft-windows-netfx3-ondemand-package.cab Download Server 2012 R2 'link' Jun 2026

: DISM could not validate the CAB or path is wrong. Fix :

Once you have downloaded the Microsoft Windows NetFx3 OnDemand Package.cab file, you can install it using the following steps: : DISM could not validate the CAB or path is wrong

Then retry the CAB installation.

Sourcing and using for Windows Server 2012 R2 is the most dependable method to deploy .NET 3.5 in air-gapped, remote, or problematic environments. While Microsoft encourages the use of Windows Update, the CAB file gives you absolute control over the installation source. Always download from official Microsoft channels, verify file integrity, and use DISM for a quiet, automatable deployment. verify file integrity

Alternatively, you can use PowerShell to install the feature: and use DISM for a quiet

Get-WindowsFeature -Name NET-Framework-Features

Explanation of switches :