This file contains the portable, offline source for .NET 3.5, allowing installation without mounting the full OS ISO.
Instead of downloading a standalone .cab from third-party sites, which can be risky, the official and safest way to obtain this package is from your . This file contains the portable, offline source for
The required file is: microsoft-windows-netfx3-onDemand-package.cab Method 2: Server Manager (GUI) Open Server Manager
Prevents the server from trying to contact Windows Update, which often causes the process to hang. Method 2: Server Manager (GUI) Open Server Manager and click Add Roles and Features . | | 0x800f0906 | Cannot download from Windows
dism /online /get-features | findstr "NetFx3"
| Error Code | Meaning | Solution | |------------|---------|----------| | 0x800f081f | Source files not found | Ensure the folder path is correct and the CAB is not nested in subfolders. Use dir C:\Temp\NetFX3\*.cab to confirm. | | 0x800f0906 | Cannot download from Windows Update | Add /LimitAccess to your DISM command to force it to use only the local CAB. | | 0x800f0922 | Feature installation failed after reboot | Check Group Policy: Computer Config → Admin Templates → System → "Specify settings for optional component installation". Set to "Enabled" with alternate source. | | 0x80070005 | Access denied | Re-run PowerShell/CMD as Administrator. | | 0x800f0831 | CBS corruption | Run sfc /scannow and dism /online /cleanup-image /restorehealth first. |
Microsoft-Windows-NetFx3-OnDemand-Package.cab (Size approximately 70–90 MB depending on language and build version)