I am running Windows 7 Professional and WLM. Another suggestion to deal with how to read .eml files you have saved is to google the same and look for a solution there. Our only difference it appears is you have Word Perfect and I have Word. Word will open a .eml file. Can't help with Corel. What I suggest you do is buy Office 2011 Home and Student Version. It is relatively inexpensive and comes with 4 licenses.
I wish I could get rid of WLM but the alternative, which is Outlook, is too expensive. It is itself costly and, if purchased as a part of Microsoft's Office suite, drives up the cost. Microsoft has competition in the office suite arena but not with Outlook. The purchase prices reflect that reality.