I am trying to install Postgres 8.4. I had 8.3 installed. Because I didn't have any important data, to make it easier I removed 8.3, the data directory, removed the Postgres windows user and removed all registry values I could find. I also shut down my anti virus and anti spyware software that was running (and restarted my computer).

When I run the postgres installer (postgresql-8.4.0-1-windows.exe) I get an error about the file postgresSQL.conf not being found. When the installer finishes I have an empty data directory. I also tried installing the data directory in a place other than the program files directory. I have done this a few times now and I'm just not seeing what I'm missing. When I originally installed Postgres 8.3 I didn't use the one click installer. Since then I have upgraded to another 8.3.x without any issues.