Microsoftwindowsnetfx3ondemandpackagecab Download Server 2012 R2 New [new] Jun 2026
Alternatively, check Registry: HKLM\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5 – the Version key should exist.
The safest and most reliable source for this file is your original Windows Server 2012 R2 installation media. ⚠️ – integrity risk
: Insert or mount the Windows Server 2012 R2 installation media (e.g., to drive Add Roles and Features Server Manager Add Roles and Features Select Feature : Proceed to the page and check .NET Framework 3.5 Features Specify Source Path Confirmation page, click the warning link: "Specify an alternate source path" : Enter the path to the folder where the file resides: D:\sources\sxs Method 2: Using PowerShell (Recommended) ⚠️ – integrity risk
If you receive errors, they are typically related to the sxs source path not being correctly identified. ⚠️ – integrity risk
⚠️ – integrity risk. Always use Microsoft-provided media.
Run the following command:
: Open the local Group Policy Editor ( gpedit.msc ). Navigate to Computer Configuration > Administrative Templates > System . Double-click "Specify settings for optional component installation and component repair" . Set it to Enabled and check the box to "Contact Windows Update directly to download repair content instead of Windows Server Update Services (WSUS)" . Run gpupdate /force and retry the installation.
