I just ran the installer on one of my Windows 2008 R2 systems and it worked.
I unzipped the installer to the C:\ drive and installed there as well.
When you launched the command-line session did you right-click and select "Run as administrator"?
Would it be possible to attach the installer log here so I can take a look?
..\hyperic-hq-installer-5.0.0\installer\logs\hq-install.log
Thanks