The Security Center lets you check the status of your essential security settings.
The best thing about Windows XP is that, because it belongs to the Windows NT/2000 product family, it's designed from the ground up for reliability, security, and networking. XP Home users will soon see the benefits of this. The dreaded Windows crash-and-reboot cycle really is much less common with XP, and, provided the hardware is up to scratch, XP's performance is better, too. The downside is that using a different code base can make compatibility with old applications less assured. Business applications normally run fine, but older games, MIDI software, and system utilities may well cause problems.
Windows XP is more customizable than previous versions, including its visual themes that let you change the whole appearance of Windows in an instant. Fast User Switching is a neat feature for computers used by more than one person--it lets another user log on without killing the previous user's session, and when you switch back, running applications and open documents are as you left them. This is impressive, but what really counts is that XP understands how to deal with multiple users. Each user has their own special folders, such as My Documents, which cannot be seen by other users. And for those with more than one computer, the network setup wizard simplifies setting up a network.