Well, since you have a new PC, did you also install the updates for Office
2000 when you installed that on your new PC? If not, then the first thing to
try would be to install Office 2000 SP3, Jet 4 SP 8, and possibly MDAC 2.8.
Also, run Windows Update and see if there are any OS patches that need
installed.
Once this is done, check to see how much space you have on the disk where
your temp directory is. To find where this folder is located, go to
Start|Run and type %temp% then click ok. Explorer will open at the temp
folder. If there is a bunch of junk in this folder and you have shut down
all your programs, delete the items in this folder. Do the same thing for
the %windir%\temp folder. You may not be able to delete everything in these
folders, but you should get down to no more than a handful of files. You may
also be able to delete them by using Start|Programs|Accessories|System
Tools|Disk Cleanup, however, I believe that this uses the time stamp on the
files and won't delete them unless they meet a certain age requirement.
Another thing to check are the permissions on the temp folders and the
folders that the Excel and Access data files are in. If you're working
across a network, also check the share permissions.