You can not only improve your system's overall security, but help deal with spam more effectively, all while gaining a spellcheck program for your email client. And not just any spellcheck, but an inline spellcheck, so it's checking as you type, not just if you remember before you send the message.
The catch is, you have to stop using Outlook Express and move to Mozilla Thunderbird. All you mail and account settings should be picked up automatically the first time you run Thunderbird, so it should be pretty painless. It's also as I said, your system's overall security improves, you get better spam management tools, and an inline spellcheck. It's a win-win all around for you. Switching to Mozilla Firefox from Internet Explorer only makes things better, by further improving your system's security.