10g Express Edition install doesn't start HTTP server on port 8080

Question

I've just done (several) installs of 10g XE on a Windows XP (SP2) box which appears to install correctly, but there's nothing listening on port 8080 (which is available)
The services OracleServiceXE and OracleXETNSListener are both started (and can be stopped/restarted too).
Looking in C:\oraclexe\app\oracle\product\10.2.0\server\config\log\postDBCreation.log (and other log files in that directory), I see some worrying lines like this:
SQL> connect "SYS"/"&&sysPassword" as SYSDBA
ERROR:
ORA-12638: Credential retrieval failed
Also running SQLPLUS from a CMD window fails:
C:\oraclexe\app\oracle\product\10.2.0\server\BIN>sqlplus sys
SQL*Plus: Release 10.2.0.1.0 - Production on Thu Jun 19 15:31:59 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Enter password:
ERROR:
ORA-12638: Credential retrieval failed
I already have some Oracle client software installed, PL/SQL developer 7.0.1.1066.
ORACLE_HOME is not set.
Is there an installation log file I can examine that might indicate what's gone wrong?
Tony.

Answer 1

Interesting error. See http://oracle-unix.blogspot.com/2007/08/ora-12638-credential-retrieval-failed.html for a blog entry (and workaround).
As for the 8080 web connection failing, I assume that this is related - the listener unable to hand off the web browser request to the Dispatcher.
Also note that by default it only listens on localhost port 8080. So using the hostname or IP of your machine won't work until that default config is changed.