Carlson Software Knowledge Base

Microsoft Default settings contain a hardware lockout to all users with the exception of the Administrator of the
computer, unless otherwise specified.  
This is the cause of a great many failed installation.
If you are logged on as a guest, you cannot (in most cases) install new software to your computer.
If you are logged on as a guest, log off and back on as the Administrator. 
This should solve the lockout issue of installation.