A. You might not be logged on as an administrator. You must be logged on as an administrator to turn on the Internet Connection Firewall. When you first set up your Windows XP computer, the set-up procedure guides you through the process of establishing an administrator account and password. If you did not set up an administrator account, the default administrator account has the user name: Administrator and the password is blank. Do not type anything in the password field. Windows XP also provides the option to create a password reset disk, in case you forget your administrator account name and password. If you have set up a separate administrator account and password, but you have not made a reset disk, and you have forgotten the user name and password, you will be required to reinstall your operating system before you can turn on the firewall.