Our home PC is older running Windows XP, as well as IE 8 with Outlook Express.

Love Outlook Express!  Our home users all use that still.

But I realize that when our old PC dies soon, we will be getting Windows 8.  I have another personal laptop running Windows 7 and IE 10, so begrudgingly getting used to Live Mail for email on that machine (and getting used to Windows 8 on my new Surface, but it has a useless mail app). 

Seems like I read a lot of problems experienced by XP systems downloading Live Mail.  And in fact, it doesn't list XP as a supported system.  But it would be nice if I could do that on our old PC, because other household users besides myself could get used to it and transfer data, before the machine dies.

Of course, I'm thinking that Live Mail can store information in the cloud, so it's easy to set up a new machine? Is that true, or is information stored only on the machine?

Anyhow, should I try and download it to XP, too much risk to bother with it?