Error 1603 means Fatal Error during installation and Microsoft has created this article for that error.

http://support.microsoft.com/kb/834484

Most likely the problem is caused by SYSTEM account not having full control permission to the installation folder.

This topic is valid for:

Nokia C6,Nokia E73,Nokia E7,Nokia E6,Nokia X2-01,Nokia 808 PureView,Nokia 700,Nokia 5310