Just renewed and updated Avast Internet Security and am still unable to run Safe Zone Browser.Had same difficulty with previous version, but now would like to correct problem. Whenever I click on Safe Zone Browser, system immediately shuts down and reboots. I have used the removal tool and re-installed version 8 but problem still exists. I'm running Win XP Pro/SP3 with all updates. Web browser is latest Firebox. Any thoughts on the subject will be appreciate. Thanks for looking.