How to Fix Error Code 0x800f081f: .NET Framework Installation Issue on Windows 8.1

If you encounter error code 0x800f081f while installing .NET Framework on Windows 8.1, try the following solutions:

1. Update Windows: Ensure your Windows 8.1 has the latest updates. Navigate to Settings > Update & Security > Windows Update and click Check for updates.
2. Run the .NET Framework Repair Tool: Microsoft offers a repair tool for .NET Framework that addresses common installation problems. Download and run it from the Microsoft website.
3. Manual Installation: If other methods fail, manually install .NET Framework. Download the installer from the Microsoft website and run it as an administrator.
4. Disable Antivirus: Sometimes, antivirus software can block installations. Temporarily disable your antivirus software and attempt the installation again.
5. Perform a Clean Boot: A clean boot can help pinpoint and resolve software conflicts causing installation issues. Follow Microsoft's guide to perform a clean boot.