Sometimes users will encounter errors or issues as a result of incomplete installation of the client components. This is often caused by permissions issues. The instructions below have proved useful in resolving the security/permissions issues and getting a successful installation. (The account executing these steps will need administrative privileges on the computer).
If the operating system is Vista or Windows 7, you will need to turn OFF UAC first, using the steps below. Additionally, on Vista if using Internet Explorer (IE) 8, you will need to turn off protected mode. Turning off UAC in Windows 7 also disables protected mode for IE 8.