.NET Framework 4 installer error (HRESULT: 0xc8000222)

Summary: .NET Framework 4 failed to install because of error code HRESULT: 0xc8000222.
Related installation help: Troubleshooting Rhino 5 Installation

Cause:
Some files corrupted in the Software Distribution folder.

Solution:

  1. Download Fix_0xc8000222.zip.
  2. Extract the Fix_0xc8000222.bat in the zip file to a folder.
  3. Right-click on the Fix_0xc8000222.bat and select Run as Administrator.

    What this batch file does:
    1) Disables Windows Update Service.
    2) Deletes the C:\Windows\SoftwareDistribution folder which was locked by Windows Update service.
    3) Restarts Windows Update Service.