Is your XP updated to Service Pack 3?
Run another manual Windows Update and install ALL .net framework updates.
Next.. check if the secondary logon service is running: turn on the secondary logon. the secondary logon service is a standard windows service which is available on every windows computer. in the latest versions it is not started automatically. you need to start it via control panel . administrative tools . services. starting it once should insure it works in the future also.
Then check if your hosts file is OK:
this should fix it;http://holdemmanager.net/forum/showthread.php?t=8182
SQL 8.2: should ALWAYS run: http://ftp.postgresql.org/pub/binary/v8.2.22/win32/postgresql-8.2.22-1.zip but ideally you should install SQL 8.4.