Oracle Windows Privileges

in windows if a user in ora_dba group get the following:

C:> SET ORACLE_SID=InstanceSID
C:> sqlplus /nolog

SQL*Plus: Release 9.2.0.1.0 - Production on Wed Dec 13 10:18:27 2006

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

SQL> conn sys/password as sysdba 

Connected to an idle instance.

SQL> startup nomount pfile=C:\location_to_file\init.ora;

ORA-01031: insufficient privileges

SQL>

Do the following:

simply create (or modify) a file named sqlnet.ora in your ORA_HOME\network\network\admin directory and add to it the following line:

SQLNET.AUTHENTICATION_SERVICES = (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES, ONAMES, HOSTNAME)