This happens if there is a pending system reboot from a previous Windows Update.

Here is the solid, verified information regarding the offline installer for Windows.

1 GHz or faster 32-bit (x86) or 64-bit (x64) processor. RAM: Minimum 512 MB (1 GB or higher recommended).

No action is needed. Your applications will run using the existing, updated framework version. Error: HRESULT 0x800c0006

Parameters explained:

Once the installation finishes successfully, click Finish . It is highly recommended to restart your computer to apply all system-level changes. Enterprise Deployment and Silent Installation