[JSteff]

Windows 7 is excellent. It is stable, customizable, and combines intuitive usability that previous Windows promised but did not deliver on and good looks of Vista.

It comfortably runs most of XP programs I have (like Office 2003).
The only bad thing is that OE is gone and there are no other light weight mail programs out there!

[thoolou]

Try Mozilla Thunderbird.

I've been using it for almost 5 years at work, and have had no problems.

[dglang]

Try Eudora OSE, I’ve been using it when I lost the ability to use Outlook Express.

It is able to maintain the saved email folder structure very well. I happen to keep almost every personal email that I have saved and I have organized them into separate folders based on senders name and type of mail such as purchases by sender or personal emails, or by various of information types.