When I bought my new Dell in April, I told them I was a 'business user' - so I was provided with 'Windows 7 downgradable to Windows XP'. Actually it was nothing of the sort; it was Windows XP SP3 which could be 'upgraded' to Windows 7.
But it came with the abysmal Windows Live Mail - which is a complete and utter piece of !!!!e. At least I was still able to use the entirely satisfactory Outlook Express with XP - because according to Micro$oft:
Outlook Express isn't available in Windows Vista or Windows 7—you can't download it or run it on either version of Windows.
Only problem was that the Office 2007 spellchecker doesn't have an English option for Outlook Express, thanks to Gates' geeks. But at least I was able to buy some 3rd part software to fix that.
However, all the settings which you used to use on your old machine should be the same on the new one, irrespective of the e-mail client.
If you want to see what people think of the useless Windows Live Mail, try
Windows Live Mail Hate - 82% People Agree (84 opinions) .....