Word 2000 error message

This can be caused by many things... (the MS KB has ten articles with this specific error message)... but if you've tried all of that, I won't repeat.

What OS are you using? How much memory do you have? What other programs are running simultaneously? Are you doing anything specific when the computer gives this error? Is it one document or any document?

Ultimately:
1) delete all *.tmp files
2) delete all ~*.* files
3) delete normal.dot file (Word will recreate it when it starts)
4) Look at MSCONFIG and choose selective startup then look at the startup tab. Remove any un-needed programs that start whenever you boot your computer and may not even use (systray and explore are needed by Windows). You may have a bunch of other programs using memory that Word may need.
5) Download ad-aware from www.lavasoft.de and see if you have a lot of the Internet ads and polling going on in background and potentially eating resources there. Remove any ads software (advertisements) that ad-aware identifies and see if the problem still persists.

I have had a similar problem. I found that deleting the user's profile and having the user log in again, which creates a new profile for that user, remedied the problem that I had. Remember to back up the users desktop and favorites before you delete their profile.

Shaun