Windows 2000 was crafted in the days where people were expected to perform backups, run the various tools to make recovery disks. 4 years later a more consumer version of 2000 is Windows XP which does this for you.

http://www.google.com/search?&q=%22windows+2000%22+recovery+disks

Besides your creation of the recovery disks, you have LKGC, SAFE MODE, RECOVERY CONSOLE and even a PARALLEL INSTALL to help a person fix an ailing OS.

Bob