I bought an HP Pavilion All in One Desktop Computer a little while ago. I got it all set up with my programs and info, then after 3 days there was an annoying buzzing sound coming from the right side of the monitor - it would not go away no matter what I did. I couldn't really figure out why it was happening and tried to control it with no success. When I tapped the monitor, it would always sound shakey during the movement, then back to its steady sound when still. I decided I had to return the whole thing to where I bought it for an exchange. Well, the exchanged computer HAD THE SAME NOISE! This time, I found out why: the housing on the front of the monitor. This is such an awful defect for HP - cheap materials, I guess! Anyway, to help others with this problem, I have placed a rock next to the noisy area and it has taken care of the noise. HP, why is your quality going downhill??