You'll have to make three major decisions when installing Windows 2000. First, you have to decide whether to perform a clean install or a standard upgrade; second, you have to decide how to partition your hard drive; and third, you'll have to specify which file system you prefer—FAT32 or NTFS. This section covers all three decisions.
Microsoft thinks it's doing you a favor by designing the Windows 2000 installer to upgrade your existing Windows installation, without disturbing any of your settings, fonts, drivers, and so on—and, more important, without requiring you to reinstall your programs. This kind of installation is simply called an upgrade.
But you can wind up with a fairly glitchy PC if you attempt to upgrade to Windows 2000 from Windows 95, 98, or Me in this way. That's why there's a second way to use the Windows 2000 installer: You can perform a clean install , described on Section A.3.2.
When you do a clean install, Setup makes no attempt to preserve your existing settings, applications, and so on. It installs a virginal, completely independent, perfect copy of Windows 2000 Pro into its own folder on your hard drive.
A clean install entails a lot of hassle, because when it's over, you must re-create all of your settings and reinstall all of your programs. But in general, a clean install is the best recipe for a trouble-free PC. Most people shrink from the idea of "starting all over," because they want to preserve their ...