Change the display method of offline messages from Messenger menu>Tools>Options>Messages>Offline Messages>Show the link of my offline messages in the main window. Other than that, you cannot remove offline messaging from WLM afaik.
Also delete your contacts cache by doing this: Messenger menu>Tools>Options>Security>This is a shared computer so don't store my address book, personal message and display picture here. Tick this option and sign out. Now, the contacts cache should be deleted from your computer and will be downloaded back from the server when you sign in again.
Note that all these things can be done after you can successfully sign in with that problematic address. If your Messenger freezes constantly with that address and you cannot access the Options window, then I can only help with deleting the contacts cache* folders from Windows itself.
(*)
quote:
Originally posted by Chris4
Definition of cache:
A small, fast memory holding recently accessed data, designed to speed up subsequent access to the same data.
It's safe to delete the cache. It won't affect your contacts list and it fixes a lot of problems with contacts.