My computer's audio/video does a stuttering/hesitation kind of thing. It also takes a very long time to boot up. The audio/video had problems on Internet streams, saved files, and CDs. These problems began suddenly about a week ago. I have 2GB of RAM, so that should not be the issue. It worked fine with 1.5GB until the problems cropped up. I would suspect the video card if I didn't have the slow boot time. I defragmented my HD recently too. I am beginning to suspect my HD is going bad. Is this a plausible explanation for my problem?