Arcadius,
sound like a knew version of a sad problem:
> 3) Note that the PC has no internet access.
I assume that TCP/IP has to be installed as a protocoll (use the loopback
device) to use PostgreSQL, because server-client communication even locally
is done via IP-Sockets.
IF TCP/IP is installed, it sounds as the usual problem with "Layerd Service
providers".
Please consult the extensive FAQ to the installer to find nearer information
and especially a link to a tool to especially check for this problem.
Harald