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.

The Information Bar in Windows XP Home Edition with Service Pack 2 notifies you when it blocks ActiveX control or active content and then lets you decide what to do.

Service Pack 2 allows users to instruct Internet Explorer how to handle downloads from a specific publisher

The XP user interface is not a radical departure from earlier versions of Windows, but there are a number of small changes that together add up to a significant improvement. For example, you can add and remove shortcuts from the Start menu by right-clicking on the icon and selecting Pin or Unpin from the pop-up menu. Windows online help is integrated into a Help and Support Center that works like an internal Web site, with searchable help, tutorials, and walkthroughs. Laptop or other flat-screen users can set Windows to use ClearType for screen fonts, for a more readable display.

There are, of course, some pitfalls. Windows XP Home is demanding on hardware, and it would be a mistake to install it on less than Microsoft's recommended minimum. Business users note: unlike Windows 98 or Me, XP Home Edition cannot join a Windows server domain, so the networking is peer-to-peer only--see Windows XP Professional Edition for this functionality. There is also no multiprocessor support, and a mildly annoying anti-piracy measure requires you to obtain a code from Microsoft for full installation and any future system changes. But don't let that put you off: this is Microsoft's best Windows yet.