Our family PC gets quite a workout. It's a five-year-old machine that runs Windows XP and is used primarily by my daughter and teenage grandson for instant messaging, e-mail, social networking, and downloading audio and video files. Since I rarely use the system, I didn't notice that its antivirus subscription had expired.
Which explains why I was a bit surprised when my grandson called when I was out of town to tell me that the PC was acting strangely. Ads appeared on the desktop as soon as Windows started and Firefox and other programs would occasionally close without … Read more