Troubleshooting Error 0x800f0927: Installing .NET Framework 3.5 on Windows Server 2012

To address the error code 0x800f0927 while installing .NET Framework 3.5 on Windows Server 2012, follow these structured steps:

1. Verify existing installation: Navigate to Control Panel > Programs and Features > Turn Windows features on or off to check whether .NET Framework 3.5 is already on your system.
2. Employ the DISM tool: Launch Command Prompt as administrator and input: DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs (substitute D: with your installation media’s drive letter). This method utilises your installation disc to enable .NET Framework 3.5.
3. Run the Windows Update Troubleshooter: Access Control Panel > Troubleshooting > System and Security > Fix problems with Windows Update, and execute the troubleshooter following the instructions provided.
4. Manual installation of .NET Framework 3.5: Visit the Microsoft Download Center, download the .NET Framework 3.5 setup, and install it by following the prompts.
5. Scan for corrupted system files: Open an admin-level Command Prompt and run: sfc /scannow to scan and repair corrupted system files if found.