Windows Update Problems

I used to have a dual boot home computer-Win2k and Me. Reinstalled the computer to Win2k only. Problem is it would not update. It gives me this message in verbatim: “Thank you for your interest in Windows Update

Windows Update is the online extension of Windows that helps you get the most out of your computer.

You must be running a Microsoft Windows operating system in order to use Windows Update”. Similarly, when accessing my Hotmail account, it gives me a message that the browser I am using is not IE. How can I fix this problem?