Overcoming Error 0x800F0906: Installing .NET Framework 3.5

Addressing error code 0x800F0906 during the .NET Framework 3.5 installation involves several effective strategies:

1. Utilize DISM tool: Launch Command Prompt as an administrator and execute: DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs (amend D:\ to your installation media drive letter). This command activates .NET Framework 3.5 using your installation media as the source.
2. Run Windows Update Troubleshooter: Navigate to Settings > Update & Security > Troubleshoot > Additional troubleshooters > Windows Update, and initiate the troubleshooter to identify and remedy any Windows Update issues obstructing .NET Framework 3.5 installation.
3. Activate from Programs and Features: Access Control Panel > Programs and Features > Turn Windows features on or off, select .NET Framework 3.5 (includes .NET 2.0 and 3.0), and click OK. This uses Windows files to install .NET Framework 3.5.
4. Download .NET Framework Repair Tool: Acquire and run the .NET Framework Repair Tool from Microsoft's official site to resolve installation problems.
5. Examine antivirus or firewall interference: Some antivirus or firewall programs might block .NET Framework 3.5 installation. Consider disabling or temporarily uninstalling these programs to proceed with the installation.
6. Conduct a clean boot: Performing a clean boot may help pinpoint and solve software conflicts that could be hindering the .NET Framework 3.5 installation.