ABSTRACT
Browser settings can also help reduce the risk of infection. Internet Explorer has a granular set of options for coping with different executable files, based on the sites that provide them and whether the files have been signed and certified by credible authorities. Windows XP, Windows 2000, MacOS X, and Linux offer administrative options that can prevent the installation and execution of unknown or forbidden software. It's probably impossible to configure earlier versions of MacOS and non-NT Windows in such a way that a wellinformed user could be kept from installing arbitrary executable code and defeating any protective measures.
