Windows installer help Popup window

I was trying to install HP Loadrunner - Load Generator in two Server. When I clicked on "setup.exe" file it opens a setup wizard, from there I clicked on â Load Generatorâ option and it also installed the three pre-requested Software/ Patches, but after installing that it shows a Widows Installer help popup window showing all the command line options. I get no error code. (Kindly see the screen shot)

I am not able to install the LR-Load Generator any more, the popup is shown whenever I click the Load Generator link in the Setup wizard.

I am using Microsoft Windows Server 2003, Std Edition - SP2