Are you using a different language besides English on your computer and maybe uninstalled the English language pack? That error typically indicates that Installshield cannot find the language files necessary to display its text.
I only have English installed Comes up with: Error Code: -5001 : 0x80070002 Error Information: >SetupNew\setup.cpp (142) PAPP: PVENDOR: PGUID: $ @Windows 7 / Server 2008 R2 Service Pack 1 (7601) IE Version: 9.0.8112.16421