Windows Live as a tab on IE has nothing to do with performance on your PC.
You're off topic for this forum, which is dedicated to Windows Live OneCare. You may want to try the Microsoft Public newsgroups here: http://www.microsoft.com/communities/newsgroups/list/en-us/default.aspx
I think your problem is probably due to the variety of programs you are using to "help" your PC. I am not familiar with the latter 3, but if any or all of them are running all the time to protect/maintain your PC they are in conflict with your McAfee suite.
-steve
Microsoft MVP Windows Live / Windows Live OneCare & Live Mesh Forum Moderator