Why I hate Outlook Express:
1) The security is terrible. I like to call it MS Worm Spreader 2000.
2) It does NOT delete from your computer!! I removed all its registy files and it STILL comes back to haunt me!
3) It's Microsoft. Duh.
If you need an email client, go with Mozilla Thunderbird. But don't even bother with an email client if you have Hotmail, they charge you to let you use an email client.