As per the problem description, I understand that Internet Explorer 10 on your Windows 8 computer is set to open new customized MSN page for Windows 8 user and you want to use the older
http://www.msn.com” as your default home page and you’re not able to do so.
I would appreciate if you can provide us the following information to help us understand the issue better.
There are two Internet Explorer version on Windows 8 computers: “Desktop” and “User Interface (UI)”, which version are you trying to change the home page for?
You may follow the steps in the Microsoft article below and check if that helps.