Upgrading to Windows 2000 Professional
You can upgrade to Windows 2000 Professional from any of the following versions of Windows:
Windows 9x
Windows NT Workstation 3.51
Windows NT Workstation 4.0
You cannot upgrade to Windows 2000 Professional from Windows 3.1 or earlier versions, Windows Me, or from any version of MS-DOS.
Preparations to Make Before Upgrading to Windows 2000
It probably won't surprise you to realize that Windows 2000 requires more powerful hardware than its predecessors:
Pentium 133MHz or compatible processor; dual processors also supported
64MB of RAM
2GB hard disk with 650MB free space
CD-ROM or DVD-ROM drive
VGA or higher-resolution monitor
Keyboard
Some older systems might require processor, memory, or hard disk upgrades to be ...
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