Oracle Database Discussions

Hello,
I am new to oracle administration. I instlled 11gR2 on windows 7 64 bit. It was working fine. Then I applied the patch DB 11.2.0.1 Patch 10: 10432045 . I can nolong connect. I tried a lot and ead lot of blogs. But now thoroughly confused! I am giving soem info that you may need. Please help!!!!
Thanks,
Badal

* All oracle related services are set to automatic start up and are all up

ORACLE_HOME=K:\app\badal\product\11.2.0\dbhome_1
ORACLE_SID=ORCL

When tried sqlplus i got

*>sqlplus myschema/password@ORCL*
ERROR:
ORA-12514: TNS:listener does not currently know of service requested in connect
descriptor

As sysdba, I got this:
C:\windows\system32>sqlplus / as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on Sat Mar 3 11:08:44 2012
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Connected to an idle instance.

lsnrctl status gives me this
C:\windows\system32>lsnrctl status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for 64-bit Windows: Version 11.2.0.1.0 - Produ
ction
Start Date 03-MAR-2012 11:11:08
Uptime 0 days 0 hr. 0 min. 20 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File K:\app\badal\product\11.2.0\dbhome_1\network\admin\list
ener.ora
Listener Log File k:\app\badal\diag\tnslsnr\HPC1\listener\alert\log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=HPC1)(PORT=1521)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully


My tnsnames.ora:
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
)
)

ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = HPC1)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)

My listner.ora:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = K:\app\badal\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:K:\app\badal\product\11.2.0\dbhome_1\bin\oraclr11.dll")
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = HPC1)(PORT = 1521))
)
)

ADR_BASE_LISTENER = K:\app\badal