Postgres 9.2.4 for Windows (Vista) Dell Vostro 400, re-installation failure (re-sent, shorter)

Hi Folks/Alvaro

On re-installing Postgres, I have not been able to get it to work. During
re-installation I get an error message saying the program exited with an
error code, but otherwise appears to be okay. However, when I go into
pgadmin and enter my password to connect to the server (any password gives
the same response), I get a popup saying 'Server doesn't listen', could not
connect, connection refused etc'. The setup defaults to port 5432 during the
install process. I've checked postgresql.conf which has not been installed,
but I've looked at an old copy that I moved into the data folder, and that
looks at port 5432.

Postgres was working okay before, so I don't think it's a problem with my
system or firewall, as I have not changed anything. After my initial
install, I edited the registry to point to the D: drive, as I prefer to have
my data stored on a separate partition, and this worked okay. The uninstall
leaves the data folder intact, and appears to leave the old service password
in case other services use it. Consequently it will not allow me access to
pg.log, even with administrator privileges, only by using pgadmin. The
Postgres install will not install with a data folder that is not empty, so I
had to re-name my data folder to data_old, and moved the contents back in
afterwards. The registry seems to be pointing to the right place to find my
data.

From the install log (as attached), I see Postgres complains that
loadmodules.vbs and adminpack did not install correctly. When I inspected
the adminpack directory it was empty, but I'm thinking that there could be
something else wrong. On my latest attempt to re-install, I don't seem to be
able to get anywhere with pgadmin, as when I try to connect I get a fatal
password authentication error now.

The main difficulty seems to be trying to re-install Postgres. If you
already have created a database, the install program balks at having a data
folder that is not empty, causing me to use the above workaround to copy
back my data afterwards. Should be able to do this!

Thanks

Stephen