ORACLE instance don't start on fresh installed operation system

Question

I installed Oracle 10g Express Edition Unicode (10.2.0.1.0) on a new installed MS Windows Server 2003 R2 Standard SP2 32bit german.
All works fine. The Application Express Login was accessable thru http://127.0.0.1:8080/apex
But after a few reboots I cannot acces Oracle's apex site any longer. And all I changed was to install MS .NET Framework 3.5.
Since 8 am I'm searching a solution. I've read a lot of posts and articles that have the same problem with accessing the apex site, talking about ports, firewalls, log entries, the OacleXETNSListener. I checked it all but I didn't find a solution.
But what I noticed is that my instance is not running after a reboot. (I try it with several new installations of Windows and Oracle and it is reproducable). If I do "connect / as sysdba" I get the message "Connected to an idle instance.".
I've realized that I'm not the first person who is affected -> e.g. http://www.dbforums.com/oracle/1619995-service-started-but-databse-not-running.html
How can these happen when the system is completely new installed?
Be aware that I'm not an Oracle Database professional (today morning I was a totaly newbie. I never worked with Oracle Databases before). So maybe the solution is really trivial. But I am finished. Help me please. Please! :)
Thank you very much in advance for your reply.
Edited by: 873256 on 19.07.2011 01:22

Answer 1

Thank you very much for your answers.
If I log in with */ as sysdba* the message is "Connected to an idle instance.". If I type startup in the console the ORACLE instance starts up, like sb92075 wrote in post 2. After that the apex site is reachable (The site http://127.0.0.1:8080/apex. Is it called apex site? I'm not sure.).
But If I restart the computer I have to do it again.
@Vishal Joshi
I'm not sure, how I can find the service tab. Do you mean the services in Windows -> Control Panel > Administrative Tools > Services?
There, the services OracleServiceXE and OracleXETNSListener start automaticly. OracleJobSchedulerXE is disabled. OracleMTSRecoverySercice and OracleXEClrAgent start manually.
Or is it an option in an Oracle configuration?
My configuration file tnsnames.ora looks good I think:
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
(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)
I'm at a loss. :(
Thank you very much in advance for your reply.
Edited by: 873256 on 19.07.2011 01:12