I have excel attachments emailed to me daily, but when I open the attachment it opens in excel viewer instead of excel. I have excel installed. This only happens with my excel attachements from Outlook
migrated from stackoverflow.com Sep 26 '11 at 8:03
As paulmorriss pointed out, you should tell us what happens when you open a file from the Windows Explorer.
Here is what you (or whoever has the same problem) can try:
The next time you open such a file type, it should open directly with that program (even from Outlook).