"BTW, is there a way I can block addons from being added without my permission? <div class="inter-pagination collapsable"> </div><div class="inter-pagination collapsable">I'm not so sure that you didn't give your permission. For instance Brother Soft uses the Conduit Downoader, and when you click on the downloaded icon you're clicking on the Conduit downloader/installer. There are check boxes to uncheck if you don't want the toolbar. You see, you have to opt-out, you don't opt-in. Your permission to install their crapware toolbar is assumed. Whenever you download an application with a toolbar bundled alog with it, and then install it, you're supposed to be given the choice as to whether or not you want the crapware as well. As for installers that don't ask you for permission, probably an application such as Kaspersky Internet Security 2012 would hlp, but only if Kaspersky considers the add-on to be harmful, in which case it won't let you install it even if you want to. Using a computer without a good security application is like spending a week in a cat house in Bangkok without rubbers. Also, get rid of Windows XP. Its security is dreadful.