The repair on all releases of Office you have, even if you are not We have tracked some crashes of Excel 2010 and above to still having Excel 2003 on the PC and Excel 2003 being corrupted.Random Excel crashes, especially when Excel is closing, are also an indication of a bad installation of Office. If you are getting error messages like 'error in module 1', ' unspecified error', or ' undefined reference', the problem is not with our add-ins! It is a problem with the installation of Office.