I just completed rebuilding a pc from scratch with Windows XP Professional x86. It appears that when the newest version of Apple's Quicktime is installed, the Website Blocking protection becomes grayed out and cannot be checked to enable it. If you exit the protection and re-enable it, it will work again until the computer is restarted. Then the same thing again. I have re-setup the computer from scratch 3 times (formatted the hard drive, installed drivers, did all MS Updates, etc.). The computer is running the latest versions of basic software.....Adobe Reader 11.0.3, Java JRE7u21, InfraRecorder, MS Works 9, PowerDVD 5 and Avast Antivirus 8.0.1489. Exceptions have been inserted into both Avast and Malwarebytes for each program. Malwarebytes Website blocking protection works fine until Apple Quicktime is installed. As soon as Quicktime installation completes, the website protection becomes grayed out and problem begins. Quicktime is needed because of a quicktime movie for a client's advertisement he has posted on his webpage so I can't just uninstall Quicktime. Any idea what could be with the Quicktime installation that could break the Website Blocking protection? I did just disable the Auto Update option for Quicktime to see if that helps but it didn't help. Anyone else run into this?