Answer 3
http://support.microsoft.com/kb/290301Windows Cleanup utility.. You click "Windows live feeatures" or something similar, uniuntall all the tjings starting with "Windows live", its specially tailored by windows to work with it =)
or
However if you are just try ing to delete live messenger you can get a very good 'cleaning programme' free at:-
http://www.ccleaner.com/It has a 'tools' icon on the left and in there it has uninstall (and startup uninstall) it does list all the messenger fiels in there and is easy to delete them