Cannot fix ERROR:ORA-01031: insufficient privileges I have tried almost every solution on the internet however I still cannot fix this problem. I cannot login as sysdba every time I try SQL&gt;connect /as sysdba I get the error ERROR:ORA-01031: insufficient privileges. 

My account is in ora_dba group. I'm using oracle 10g. I'm new to database so I really don't know what to do.
I assume that you run this on the server that hosts the database and that you have set the ORACLE_SID to the one of the database that you want to access. You must run the orapwd application. This generates a file that holds the password. Check the documentation for the exact syntax. It depends a bit on the OS on which you host the database.