PostgreSQL service will not start

[george.gradinariu]

Hello! I have recently purchased PT4 but it seems there are some issues with the PostgreSQL installation.
Initially I used the PT4 built-in installer for PostgreSQL 8.3 but the install stopped at some point and it said I did not have enough privilages. I disabled UAC and ran everything as admin after following the uninstall info provided in the Support secion.
After that I tried installing PostgreSQL 9.0 manually and at the end of the installation I received a non-fatal error concerning the loading of database modules which was caused by the termination of the postgres server.
I tried to restart the service, but my Winodws 7 keeps saying that the service started then stopped.
I gave admin permissions to modify the installation folder to the postgres user but nothing changed. I also deleted postmaster.pid but nothing changed.

In the event viewer I still get the following warnings and errors.

2012-12-14 15:10:46 EET LOG: could not bind IPv6 socket: No error
2012-12-14 15:10:46 EET HINT: Is another postmaster already running on port 5432? If not, wait a few seconds and retry.
2012-12-14 15:10:46 EET LOG: could not bind IPv4 socket: No error
2012-12-14 15:10:46 EET HINT: Is another postmaster already running on port 5432? If not, wait a few seconds and retry.
2012-12-14 15:10:46 EET WARNING: could not create listen socket for "*"
2012-12-14 15:10:46 EET FATAL: could not create any TCP/IP sockets

And this happens everytime I try to start the postgresql service. Obviously PT4 does not work under these circumstances.
Any suggestions? I would really appreciate your help.

[kraada]

Click Start type %systemroot%\system32\drivers\etc\ and click on it when it appears. Open the hosts file in Notepad and paste its contents here for me please.