PC Stats posted a tip about making Windows Mail work in the Windows 7 Operating System 

Many people have been disappointed to discover that Windows Mail is not included in Microsoft's Windows 7 operating system. In it's place is a new email program called Windows Live Mail that's earned its fair share of scorn.  Luckily there is a way to bring Windows Mail back from the dead. In this Tech Tip PCSTATS will show you how to make Windows Mail work in a Windows 7. Experience with Windows Command Prompt would be helpful, see this Guide if you need a refresher.

  Tip: Make Windows Mail work in the Windows 7 Operating System