Oracle XE on Windows 7 laptop. Changed computer name, now cannot connect

I run Oracle XE on my laptop with Windows 7. I just changed my computer name and rebooted. Now I cannot connect to the Oracle XE database at all. I found references to the old computer name in the listener.ora and tnsnames.ora files under C:\oraclexe\app\oracle\product\10.2.0\server\NETWORK\ADMIN.
Is there any other file I need to update in order for the change to work?
Thanks!
François

Is the database running? (check near the bottom of alert_xe.log, was the last startup OK ... )
Other than the updated host = <hostname> in listener.ora and TNS alias that should be all the updates that are needed, as long as your <hostname> resolves to the right TCP address, and a reverse lookup on the TCP address shows the new hostname, as a double check it try these in a command box (dunno about win7 if the nslookup is in the winnetworking or maybe something different? hosts?) ...
$ ipconfig /all
Host Name .. : <hostname>
Ethernet adapter Local Area Connection:
... IP[v4?] Address: <your TCP/IP address>
$ nslookup <hostname>
... <your TCP/IP address>
$ nslookup <your TCP/IP address>
... <hostname>

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