Here are a couple of sites that discuss slow performance. The first is by
Charles Williams and the second by David McRitchie:

http://www.decisionmodels.com
http://www.mvps.org/dmcritchie/excel/slowresp.htm

dcoats wrote:

With a new install of Excel every task is taking 15 sec. to complete. I
timed it - all the same amount of time from opening a file, unhiding columns,
moving rows....

Reinstall fixed it for one task. Everying else on the computer runs normally.

--

Dave Peterson