I have a PC that I bought a little over a year ago, I have Vista home premium on the computer and I have recently been receiving a message that the computer is predicting a hard disk failure. I have backed-up my files onto an external hard drive and I have tried to do a chkdsk scan but it is telling me that it can't because the disk is in use and prompting me to have this started when I start up my computer but it doesn't happen. Also I wasn't having any problems with my computer shutting down until I did my complete back-up onto the external hard drive now it isn't shutting down completely, it goes to a blank screen and stops. Another thing that I have tried to do is do a disk defragment and it is saying that it isn't installed on my computer. I have gone into install/uninstall programs and I am not seeing the program what-so-ever? Can someone please give me some advice on what to do? Does anyone know of any good books that I can get to help me?