I tried to install a McAfee anti virus program and now my lap top has stopped working, it switches on and gets past the welcome page, however it simply stops at the background picture and does not bring up any of menu. I am able to access the control panel, but it freezes. Sometimes the McAfee logo comes up, mostly it doesn't. I'm really stuck without a laptop and would be grateful for any help asap.
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.