Windows is dangerously insecure when unpacked from the box, and there are a few things that you must do before you use it.

You just purchased the latest DELL computer, which comes pre-installed with Windows XP, McAfee antivirus software and a host of other applications. You want to connect Ethernet wire to your cable modem and start using the computer immediately.

Windows is dangerously insecure when unpacked from the box, and there are a few things that you must do before you use it.

A.
Install the latest signatures for Antivirus software

B.
Configure “Windows Update” to automatic

C.
Create a non-admin user with a complex password and logon to this account

D.
Enable “guest” account

E.
Install a personal firewall and lock down unused ports from connecting to your computer

F.
New installation of Windows should be patched by installing the latest service packs and hotfixes

G.
You can start using your computer since the vendor such as DELL, HP and IBM already would have installed the latest service packs up-to-date

Explanation:
The guest account is a possible vulnerability to your system so you should not enable it unless needed. Otherwise you should perform all other actions mentioned in order to have a secure system.