hi,
The following may be way off the mark or it may help (as I don't have specific knowledge about software versions):

Does the status bar (shown bottom left of screen & turned on under View - Status Bar) give any clues/comments while it is opening?
Does the file have any references/links to external files?
If so, try opening the other file/s first.
Another possibility is the amount of temp files etc you have in the slow computer.

Also I just did a quick search in Excelforum.com, & the following may help:
http://www.mvps.org/dmcritchie/excel/slowresp.htm
http://excelforum.com/showthread.php...ight=slow+open
http://excelforum.com/showthread.php...ight=slow+open
http://excelforum.com/showthread.php...ight=slow+open
http://excelforum.com/showthread.php...ight=slow+open

- hopefully, my bumping the thread will bring someone with more knowledge into the picture :-)

Rob Brockett
NZ
Always learning & the best way to learn is to experience...