Oracle 10 Gb preferred authentication login process

In Oracle 10 Gb, every time you use em in the web form, you will find that after some operations, you have to enter the preferred authentication, because Oracle will wait until you can allow
Use the operating system certificate. If the administrator cannot be entered, you should do so.
Choose Settings> Control Panel> Administrative Tools> Local Security Policy> Local Policy> User permission assignment as administrator, the first authentication is an Oracle Authentication Policy, that is, the next time you use the user login information Authentication