Listner lost and tools damaged Net config

Listner lost and tools damaged Net config
After you install the new version of SQL Developer, the listener has disappeared. Net Manager tool does no more. The nodes 'LISTENER' not BE open in the tool Manager of Net.
What is the problem and what should I do then?
C:\Documents and Settings\secondary boss>sqlplus

SQL*Plus: Release 11.2.0.1.0 Production on Fri Oct 7 13:13:41 2011

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

Enter user-name: hr
Enter password:
ERROR:
ORA-12560: TNS:protocol adapter error

C:\Documents and Settings\secondary boss>lsnctl service
'lsnctl' is not recognized as an internal or external command,
operable program or batch file.

C:\Documents and Settings\secondary boss>lsnrctl service

LSNRCTL for 32-bit Windows: Version 11.2.0.1.0 - Production on 07-OCT-2011 13:01:26

Copyright (c) 1991, 2010, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
TNS-12541: TNS:no listener
 TNS-12560: TNS:protocol adapter error
  TNS-00511: No listener
   32-bit Windows Error: 2: No such file or directory
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521)))
TNS-12541: TNS:no listener
 TNS-12560: TNS:protocol adapter error
  TNS-00511: No listener
   32-bit Windows Error: 61: Unknown error
ORA-12560: TNS:protocol adapter error

This error message means that the database is not up.
probably have to restart you your machine and the instance is not set to autostart.

Maybe the service status show 'on the road', but is not actually facing up.

Tags: Database

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