One of my computer with Excel 2007 installed under Windows Vista. The problem is that whenever I close or save any excel file, the Excel application will crash completely. After google the solution, the following change in registry fixed the problem.

1. Start -> Run -> Regedit.exe (start regEdit to edit registry)
2. HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Excel\Addins\BtOfficeAddin.BtOfficeIntegration.1
3. Change value loadbehavior from 3 to 0


The change is to disable one addin in excel.