Resolving .NET Framework 3.5 Installation Error Code 0x800F0906

There are multiple strategies to address the error code 0x800F0906 during the .NET Framework 3.5 setup. Explore these methods:

1. Employ the DISM tool: Launch the Command Prompt with administrator privileges and enter the following: DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs (substitute D:\ with your Windows installation media drive letter). This action activates the .NET Framework 3.5 and utilizes the installation media as its source.
2. Utilise the Windows Update Troubleshooter: Navigate to Settings > Update & Security > Troubleshoot > Additional troubleshooters > Windows Update > Run the troubleshooter. This process identifies and resolves any problems with Windows Update that might block the .NET Framework 3.5 installation.
3. Activate .NET Framework 3.5 via Programs and Features: Access Control Panel > Programs and Features > Turn Windows features on or off > Select the .NET Framework 3.5 (includes .NET 2.0 and 3.0) box > Press OK. This method installs the .NET Framework 3.5 using Windows installation files.
4. Apply the .NET Framework Repair Tool: Download and execute the .NET Framework Repair Tool from Microsoft's official website. This utility detects and amends complications with .NET Framework setups.
5. Examine antivirus or firewall settings: Certain antivirus or firewall applications might obstruct the .NET Framework 3.5 installation. Consider deactivating or temporarily uninstalling any such software before attempting the installation again.
6. Conduct a clean boot: Performing a clean boot may assist in pinpointing and addressing software conflicts that could interfere with the .NET Framework 3.5 installation.