Workaround: When closing excel, go to 1. File - Close
(if excel crash here, click on restore window on worksheet before step 1) 2. File - Exit
and installing Open office.
Removing excel 2003,deleting office files didn't help, instaling excel 2007 didn't help. It works OK when opening new document but when current documents are opened, they spoil all other work with excel and start crashing new and old documents in excel! Service packs also didn't help.