Solving .NET Framework Installation Error 0x800f081f in Windows 8.1

Follow these essential steps to address the .NET Framework installation error code 0x800f081f in Windows 8.1:

1. Update your system: Confirm that your Windows 8.1 system is fully updated. Navigate to Settings > Update & Security > Windows Update, then select 'Check for updates'.
2. Utilise the .NET Framework Repair Tool: Take advantage of the official .NET Framework Repair Tool provided by Microsoft to address common setup issues. Download and execute the tool from the Microsoft official site.
3. Manual installation of .NET Framework: Should the previous methods fail, consider a manual installation. Obtain the .NET Framework setup file from the Microsoft official site and execute it with administrative rights.
4. Temporarily disable antivirus software: Antivirus programs can sometimes obstruct the installation of software. Deactivate your antivirus temporarily to install the .NET Framework.
5. Perform a clean boot: Initiating a clean boot can help detect and solve conflicts that may be disrupting the installation. Follow Microsoft's guidelines to execute a clean boot.