Express 10g Install Hung at "Creating and starting services"

Question

I'm running Win2003 Server trying to install 10g Express. It gets to the the step where it is saying "Creating and starting services for Oracle Database 10g Express Edition". It is stuck on this screen for at least a half hour as I'm writing this post. I believe on this box I've tried this before with the same result (it's been a little while).
Any advice? Does Express install in Win2003? Are there things I can check to make sure my previous attempt at installing Express isn't corrupting my current install attempt?
TIA

Answer 1

Update:
After uninstalling, rebooting, and re-installing the installation did not hang. So problem solved. Bu
New Problem #2 - Listener Won't Start
==================================
But now my listener won't not start. After a lot of head scratching I guessed that the listener port 1521 might somehow be having a conflict with another program. I updated my listener.ora and tnsnames.ora to use port 6100 instead of 1521. I bounced my oracle services (through the Control Panel services manager) and this allowed my listener to start.
New Problem #3 - Can't Connect Using SqlPlus
==================================
Now that my listener is on port 6100 I can't seem to connect to my local Express instance using SqlPlus. Here's what I'm trying along with the error message:
sqlplus system/password@XE
ORA-12514: TNS:listener does not currently know of service requested in connect
descriptor
TNSNAMES.ORA
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = fahqsna04w1010.corp.firstam.com)(PORT = 6100))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
)