Have you tried starting in safe mode? Press F8 while booting up, then you can uninstall McAfee. However I think someone with more product expertise should help you, because I am sure there is an explanation.
Hopefully someone can help you soon.
Thanks april, I went through safe mode and uninstalled all McAfee software, back to the drawing board. Thanks again for your help.
You are welcome. I wish I could troubleshoot your issue further!