Error "The Windows Installer Service could not be accessed"

When you try to install an Application in Windows and you received the follow error:

"The Windows Installer Service could not be accessed. This can occur if you are running Windows in safe mode, or the Windows Installer is not correctly installed. Contact your support personnel for assistance".

All do you need to do is Unregister and Re-Register the Windows Installer. You can do that
following the next steps:

1. Log On "Administrator Account".
2. Click Start < Run.
3. In "Run" window  type cmd, then press Enter.
4. In "Command Prompt" window type "msiexec /unregserver" and press Enter.
5. In "Command Prompt" window type "msiexec /regserver" and press Enter.
6. Click to close "Command Prompt".

Now Try your Windows Installer-based application again.

Congratulation, now you can install the application :)