ORA-12560 TNS : protocol adapter error; ORA-1033 Oracle initialization or shutdown in progress

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Oracle

database

Hello,
I am using win XP with oracle 11g Express edition. I have a customized application written in c#.net and Oracle 11g express as backend.
It was all working fine till today, But now I am getting error.
While opening c# application I am getting ORA-1033 Oracle initialization or shutdown in progress

and if I try from command prompt.
sqlplus system/system123
Error : ORA-12560: TNS: protocol adapter error

tnsnames.ora content

XE =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = user-pc)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
    )
  )

EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )

ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )

Oracle Services in services.msc
NAme Status
oraclejobschedulerXE -
OracleMTSRecoveryService - Started
OracleServiceXE - Started
OracleXEClrAgent - Started
OracleXETBSListener - Started



TNSPING O/p.

C:\Documents and Settings\User>tnsping localhost

TNS Ping Utility for 32-bit Windows: Version 11.2.0.2.0 - Production on 14-JUL-2
013 15:57:23

Copyright (c) 1997, 2010, Oracle.  All rights reserved.

Used parameter files:
C:\oraclexe\app\oracle\product\11.2.0\server\network\admin\sqlnet.ora

Used HOSTNAME adapter to resolve the alias
Attempting to contact (DESCRIPTION=(CONNECT_DATA=(SERVICE_NAME=))(ADDRESS=(PROTO
COL=TCP)(HOST=127.0.0.1)(PORT=1521)))
OK (30 msec)

C:\Documents and Settings\User>

content of listener.ora

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
      (PROGRAM = extproc)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = user-pc)(PORT = 1521))
    )
  )

DEFAULT_SERVICE_LISTENER = (XE)

Listener Status :

C:\Documents and Settings\User>lsnrctl status

LSNRCTL for 32-bit Windows: Version 11.2.0.2.0 - Production on 14-JUL-2013 16:00
:46

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

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for 32-bit Windows: Version 11.2.0.2.0 - Produ
ction
Start Date                14-JUL-2013 15:07:14
Uptime                    0 days 0 hr. 53 min. 34 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Default Service           XE
Listener Parameter File   C:\oraclexe\app\oracle\product\11.2.0\server\network\a
dmin\listener.ora
Listener Log File         C:\oraclexe\app\oracle\diag\tnslsnr\user-pc\listener\a
lert\log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1ipc)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=user-pc)(PORT=1521)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
  Instance "CLRExtProc", status UNKNOWN, has 3 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "xe" has 1 instance(s).
  Instance "xe", status READY, has 1 handler(s) for this service...
The command completed successfully

command :lsnrctl services

C:\Documents and Settings\User>lsnrctl services

LSNRCTL for 32-bit Windows: Version 11.2.0.2.0 - Production on 14-JUL-2013 16:02
:12

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

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
  Instance "CLRExtProc", status UNKNOWN, has 3 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0
         LOCAL SERVER
      "ORACLE SERVER" established:0 refused:0 current:0 max:25 state:ready
         CLRExtProc
         (ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\NTN_438_FC77BB0E_BBD1.ORA))
      "ORACLE SERVER" established:0 refused:0 current:0 max:25 state:ready
         CLRExtProc
         (ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\NTN_438_FC77BB0E_B074.ORA))
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0
         LOCAL SERVER
Service "xe" has 1 instance(s).
  Instance "xe", status READY, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:7 refused:0 state:ready
         LOCAL SERVER
The command completed successfully

Tried login using sysdba

C:\Documents and Settings\User>sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Sun Jul 14 16:03:30 2013

Copyright (c) 1982, 2011, Oracle.  All rights reserved.

ERROR:
ORA-12560: TNS:protocol adapter error


Enter user-name:

tried connecting from sql command line

SQL*Plus: Release 11.2.0.2.0 Production on Sun Jul 14 16:04:32 2013

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

SQL> shutdown immediate;
ORA-01012: not logged on
SQL> connect system/manager321
ERROR:
ORA-01033: ORACLE initialization or shutdown in progress
Process ID: 0
Session ID: 0 Serial number: 0


SQL>

Can you please suggest a solution? I have no fresh database backup.