Oracle 10G express edition issue

Question

Hi friends,
My Oracle installation (OracleXE(10G) on windowsXP on my own machine) was working fine till yesterday, While trying a third party db migration using sql developer, I had to kill the sqldeveloper process (as system utilization ran into 100%). After that I am unable to login to my database. I have tried the following ...
from sqlplus>>conn username/password as sysdba
ERROR
ORA-01031: insufficient privileges
sqlplus>>conn username/password
connected
C:\>tnsping hostname
Used parameter files:
C:\oraclexe\app\oracle\product\10.2.0\server\network\admin\sqlnet.ora
TNS-03505: Failed to resolve name
C:\>lsnrctl status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
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=hostname1)(PORT=1521)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
32-bit Windows Error: 61: Unknown error
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=hostname2)(PORT=1521)))
TNS-01189: The listener could not authenticate the user
in the windows services menu both the services OracleServiceXE and OracleXETNSListener are started
While trying to connect thru Sql Developer >>> 'network adaptor could not establish the connection'
What is it that I am missing friends... please help

Answer 1

C:\>SET
ALLUSERSPROFILE=C:\Documents and Settings\All Users
APPDATA=C:\Documents and Settings\suman.gangopadhyay\Application Data
CLASSPATH=.
CLIENTNAME=Console
CommonProgramFiles=C:\Program Files\Common Files
COMPUTERNAME=TCS118550
ComSpec=C:\WINDOWS\system32\cmd.exe
FP_NO_HOST_CHECK=NO
HOMEDRIVE=H:
HOMEPATH=\
HOMESHARE=\\NT0FSP03\homedirL\suman.gangopadhyay
lib=C:\Program Files\SQLXML 4.0\bin\
LOGONSERVER=\\NT6DOMP7
NUMBER_OF_PROCESSORS=1
ORACLE_HOME=C:\oraclexe\app\oracle\product\10.2.0\server
ORACLE_SID=XE
OS=Windows_NT
Path=C:\oraclient\bin;C:\oraclexe\app\oracle\product\10.2.0\server\bin;C:\Perl\b
in;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem; C:\Program Files\Mic
rosoft SQL Server\90\Tools\binn\;C:\Program Files\Microsoft SQL Server\90\DTS\Bi
nn\;C:\Program Files\Microsoft SQL Server\90\Tools\Binn\VSShell\Common7\IDE\;C:\
Program Files\Microsoft Visual Studio 8\Common7\IDE\PrivateAssemblies\;C:\Progra
m Files\Sybase\Shared\PowerBuilder\;C:\OPC\MSSQL\Binn;C:\Program Files\Java\bin
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH
PROCESSOR_ARCHITECTURE=x86
PROCESSOR_IDENTIFIER=x86 Family 15 Model 4 Stepping 9, GenuineIntel
PROCESSOR_LEVEL=15
PROCESSOR_REVISION=0409
ProgramFiles=C:\Program Files
PROMPT=$P$G
SESSIONNAME=Console
SMS_LOCAL_DIR=C:\WINDOWS
SMS_LOCAL_DIR_USER=C:\WINDOWS
SUCCOR_CODE_BASE=C:\eSSPOG\C++
SystemDrive=C:
SystemRoot=C:\WINDOWS
TEMP=C:\DOCUME~1\SUMAN~1.GAN\LOCALS~1\Temp
TMP=C:\DOCUME~1\SUMAN~1.GAN\LOCALS~1\Temp
USERDNSDOMAIN=SOMERFIELD.CO.UK
USERDOMAIN=SOMERFIELD
USERNAME=suman.gangopadhyay
USERPROFILE=C:\Documents and Settings\suman.gangopadhyay
windir=C:\WINDOWS