It sounds like perhaps when you had Netscape installed it set itself up (or got set up) as your default browser, and Oulook Express is still trying to use it.

If you go to the TOOLS tab in Internet Explorer, choose INTERNET OPTIONS, and select the PROGRAMS tab, there's a RESET WEB SETTINGS button that supposedly lets you reset Internet Explorer to be your default browser - and should tell OE to use it instead of Netscape. (There's also a check box that tells IE to check to see if it's the default browser - which should have a check mark in it even if IE is the only browser you have on the machine.)

(I'm reading the clicks off of my IE. If yours looks different, click HELP in your version and search for "default browser" and you should find what you need for your version.)

Worst case - it may also change your home page back to a default page; but that's pretty easy to reset, as long as you know how to find the one you want to use.

John