I had previously given this computer a five star review. I am extremely sound-sensitive, and I bought this computer because it's silent. I loved it for that reason.Then, after using it for eight months, it started making a fan-like sound. It doesn't make it all the time, but it makes it often. It's driving me crazy.I've contacted customer support about the issue, and they are engaged with helping me to resolve this issue. I'm impressed so far with their support. I've raised my rating up to four stars based upon their response so far. If their outstanding support continues and helps me to resolve this issue, I'll probably update my review to five stars despite the issue with the sound.