I was using the Oracle 11g in my Windows 7 Professional system for few days.. Suddenly, I was not able to use the sql developer to connect the schema/user.
I found that the Oracle... services were down in the Windows services windows.
a) Oracle ORCL VSS Writer Service - running
b) OracleDBConsoleorcle - not running
c) OracleJobSchedulerORCL - not running
d) OracleServiceORCL - not running
When I started the OracleDBConsoleoracle, it thrown a error "Windows could not start the OracleDBConsoleorcl on Local Computer".
(Below solution is worked for me, based on the various fo rum threads)...
a. go to C:\.......\product\11.1.0\db_1\oc4j\j2ee
b. copy paste the folder: OC4J_DBConsole_192.168.x.y_orcl, two times
c. rename one of the two new folder as OC4J_DBConsole_localhost_orcl
d) rename the other one as OC4J_DBConsole_
after making these changes and a reboot, it started to running.........