This is the fastest method and less prone to GUI timeouts. Ensure your installation media is mounted. powershell # Replace 'D:' with your actual drive letter
If you prefer command line, you can use PowerShell to install using the ISO source. This is the fastest method and less prone to GUI timeouts
Once you have copied the CAB file to your local directory (e.g., C:\sxs\ ), you can bypass Windows Update entirely by forcing the system to read from your local directory. Once you have copied the CAB file to your local directory (e
Open the or PowerShell with administrative privileges. You will need access to a Windows Server
The most reliable method to fix this "file not found" error is to use the Deployment Image Servicing and Management (DISM) tool. You will need access to a Windows Server 2012 R2 ISO file or a USB/DVD drive.
Forget the bloated ISO mounts and failed wizards. With a valid, digitally signed .cab file and the DISM commands outlined in this guide, you can install .NET Framework 3.5 on Windows Server 2012 R2 in under two minutes—cleanly, silently, and reliably.