If it happened to me, I'd start excel in Safe mode

close excel
windows start button|Run
excel /safe

File|open a few workbooks to test it out.

If everything worked ok, I'd start looking for "helpful" addins that get loaded
when excel starts normally.

Chip Pearson has some notes on how to diagnose startup errors at:
http://www.cpearson.com/excel/StartupErrors.htm

And Jan Karel Pieterse has more notes at:
http://www.jkp-ads.com/Articles/StartupProblems.asp

cswasson wrote:

In Excel 2002, Anything I high light with the mouse or LEFT click the mouse,
it delete the info. I tried to us the undo it shows "undo clear" no matter
how many times I hit it nothing happens.. I have tried re-booting and other
spreadsheets, it still happens.
PLEASE HELP
Christie

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Dave Peterson