From the server.log, looks like you're hitting some DB connection errors. I assume that you're using the windows bundle (which includes a postgresql database).
1. Are you sure that postgres is running? Should be fairly easy to detect
2. Are you sure that the right ports are open? You might want to temporarily disable your firewall to see if that changes anything. If it does, it means you have disabled the port on which postgresql listens.
3. If you're using an external database, then for whatever reason, it's rejecting your connection.
The connection is being refused outright, so either the db is having trouble starting, or the port is closed, which is probably a windows firewall issue.
You didn't state which CPU arch you're using - I assume it's 32-bit x86?
-John Mark
