Beta 1 Installation fails

Several users here have attempted to install the Beta 1 for 2012. In all cases, the install will progress, but then fail with a dailog stating "The wizard was interrupted before SolidWorks 2012 Beta 1 could be completely installed.". There is no indication why the failure. Repeated attempts to install result in same failure. Please advise on how to successfully complete the installation.

SolidworksSolidworks 2012 Beta