系统管理员身份登路windows后:
1、开始——cmd
2、sqlplus / as sysdba(注意:sqlnet.ora文件,打开它看看是否有SQLNET.AUTHENTICATION_SERVICES= (NTS),如果没有加上;查看当前用户是否在ora_dba组,如果不在这个组,加入这个组)
3、alter user sys identified by NEWPASSWD;
--alter user sys identified by manager;
4、alter user system identified by NEWPASSWD;
--alter user system identified by manager;
修改完毕!