I'm reinstalling RBPM on a Windows 2008 R2 server, but no matter how
careful I am about uninstalling the previous install before running the
JBoss + PostgreSQL install program, the PostgreSQL install routine
throws an error, popping up an 'Alert' window that has no text in it
whatsoever. I can click 'Cancel' or 'OK' at that point, but neither one
yields a usable PostgreSQL installation.

I'm on the verge of wiping and reinstalling Windows. Is there an easier