Try scanning your hard drive for errors. Also try a repair of office in
add/remove programs.  Do the machines have the same amount of memory?
Perhaps the one with problems has less memory.  Unclick any un needed
add-ins in Tools, Add-ins.

Lastly, there may be corruption in the file.  Try this:  Open the workbook
on the good machine.  Create a new workbook.  Then go to the "bad" workbook
and select all sheets (right click on a sheet tab).  Then copy (not move)
all these sheets to the new workbook (via right click on tab).  Check the
new workbook to insure you did not create any links back to the old workbook
via Edid, Links.

Bob Flanagan
Macro Systems
http://www.add-ins.com
Productivity add-ins and downloadable books on VB macros for Excel