sorry i am at a lost
last thing you instill windows 2000 fresh then go to
Ms-Office update get the new instiller for your windows there let it scan your pc you using ms-word i hope then you can check for updates there too
windows update & office updates both are Mircosoft
here the Office link:
http://office.microsoft.com/productupdates/
give it a try see if there is a new instill to update your system there if there is get it asap ok
you having trouble with instilling software so i hope this may help only thing i can think of or your Cd-rom needs cleaning.
other then that maybe "Panther DF Staff" can help you more seen him help a lot other people out when it come to system troubles with Windows 2000 & Windows Xp