Funny (?) how all the responders think they know the answer, but they really don't understand the problem. I too have Windows 7 with Windows Live Mail not only installed but up and running. I have some old .eml files in folders that when you double click
on them, they open right up as email messages in good format. But I have other .eml files in folders (both sets coming from Windows Mail in Vista) that when you double click on them simply will not open. I do have defaults set up so .eml files open with Windows
Live Mail. What happens is that when you double click on a file, it opens (or switches your screen to if already open) Windows Live Mail, but it does NOT open the message. It just dumps you into your inbox. So, it is quite possible to have .eml files that
Windows Live Mail will not open even when you have WLM installed and designated as the default program. There must be some small difference between the two types of files, which I will continue to try to determine.
UPDATE: OK, here is what I found. The files that open correctly are .eml files. The ones that do not open correctly were saved, when copied into the folder, as ._eml files. When I change the extension to .eml, the immediately open correctly.