The internet is a wild, wooly place. The best way to avoid system infections is to (a)Avoid Internet Explorer and (b)Avoid Microsoft Windows. The second may be difficult for you, so let’s work on #1. Download and install Chrome (https://www.google.com/chrome/browser/desktop/index.html), Firefox (https://www.mozilla.org/en-US/firefox/new/), or Opera (http://www.opera.com/download). Besides being safer, all three support extensions that will enhance your browsing experience. Once you get your browser installed, do a search for (browser name) extensions, and go shopping for great free stuff. And surf safely!