I installed Oracle database 10g as an administrator on a windows 10 machine, it worked fine, but when i try to connect sys as sysdba it gives me the error: ORA-01031: insufficient privileges I checked sqlnet.ora file and if SQLNET.AUTHENTICATION_SERVICES is NTS and it is: SQLNET.AUTHENTICATION_SERVICES= (NTS) NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT) I added the user toRead more