I am attempting to install Spybot Search and Destroy on my Windows XP machine but the installation window keeps minimizing and, eventually, canceling itself. Similarly, when I try to visit certain forums (Windows OneCare and other security sites), my Firefox browser closes. Now, in both cases, it asks me if I really want to close the window but when I click "No" it pops right back up asking the same thing. Has anyone experienced this or know what the problem is and how I can resolve it? Thanks!