This is an easy one… Just goto your control panel then user accounts, and create a new account. Make sure the account is created as an administrator account. Log into the newly created account copy over any files you need and your done.
Note: This only works if you selected associate your .net passport with your windows user account when you were installing MSN messenger and setting up windows messenger.
Also if this doesn’t work, you can try uninstalling windows messenger by going to your control panel, select add / remove windows components and uninstall windows messenger and follow the steps I have listed above.
This worked for me.. I hope it works for you ….. Luck