Yeah the Internet Explorer 8 Beta 2 disables my McAfee Product. So it is wisely to uninstall this browser or else your computer will be compromised. Why Microsoft release this product? They didn't even test it on their own? I'm an avid fan of Microsoft but in that case, I must be more careful. Beta are the products that needs improvement so if you want to try this at your own risk, I'd better tell you to use Opera Web Browser or Google Chrome.