I am trying to sign into Windows Live Messenger but it's giving me Error code: cffff82e

The messenger version is 2011 (Build 15.4.3555.308) and the operating system is Windows 7 Professional.

My PC runs Windows XP Professional - Windows live messenger 2009 is applied - When I sign in on windows live messenger my credentials are not kept & saved when I sign out and re-start the computer - It seems that Internet explorer 8 updates interfere with windows live messenger - No problems were encountered with Internet Explorer 7 - The question is how to keep these credentials without installing a new copy of Windows - Thank you and best regards.

A. Elias