Unable to complete Office 2010 Installation

Hi,
I currently have Microsoft Office 2007 installed on my personal computer. I recently purchased Microsoft Office 2010 and tried installing it on my personal computer ,but was unable to complete the installation.
I get the following error message during the installation.
"Error 1406. Setup cannot write the value to the registry key."
Then the installation is canceled. Does anyone know what this error message means. I did uninstall Microsoft Office 2007 on my computer ,so there should be no conflicting registry entries.
I tried the installation several times using several installation medias, but still get the same error message.
I also restarted my computer several times, but it did not help.
Thanks.
