I have a problem with my hard drive. I have a 120 GB Western Digital hard drive and there is a problem with it. Sometimes my hard drive would run smoothly, but if I run something, sometimes the hard drive would make the loading sound over and over again and the computer would lag or freeze. And when I turn it off, sometimes my computer would not detect my hard drive and I would have to turn it off and on until it is detected. I had the hard drive for at least two years now and it is only now that the problem appeared. Did anything similiar ever happened to anyone here or know how to fix it? Could it be a registry problme because I ran a registry cleaner prior to the problem, but I don't know if that would affect it. I getting annoyed and I'm not sure what to do. Any advice is appreciated. Thanks