In my installer, I checked the registry key (HKEY_CLASSES_ROOT\Excel.Application\CurVer) to get version of Excel. It has worked since day 1. However, recently we find on one client's PC there is no such key and my installer fails. So I wonder if there is any other registry key to get version of Excel? Or the client's Excel has some issue?
Thanks
Edit
The client has office 2010 (32 bit), windows 7 (64 bit).