Troubleshooting Error Code 0x800f0930 for .NET Framework 3.5 on Windows Server 2012

Follow these steps to resolve error code 0x800f0930 and ensure successful installation of .NET Framework 3.5 on Windows Server 2012:

1. Verify .NET Framework 3.5 installation: Open Server Manager, proceed to 'Add Roles and Features' wizard, and check if .NET Framework 3.5 is installed. If present, consider uninstalling and reinstalling.
2. Execute DISM command: Access Command Prompt as an administrator and input: DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs (adjust 'D:' to your installation media drive letter). This installs .NET Framework 3.5 directly from the media.
3. Check for updates: Navigate to Windows Update settings, check for and install any updates pertinent to .NET Framework, then retry the .NET Framework 3.5 installation.
4. Adjust Group Policy settings: If your server is domain-connected, verify Group Policy settings for .NET Framework installation, ensuring policies for optional component installation and direct download from Windows Update are enabled.
5. Temporarily disable antivirus software: Some antivirus programs can block .NET Framework installation. Temporarily disabling the antivirus may help.
6. Ensure Windows Installer service is active: Confirm that the Windows Installer service is operational via the Services console. Start the service if necessary and proceed with the .NET Framework 3.5 installation.