Hi, I have a mesh pc with a sata hard drive, I was useing xp media edition sp2 I believe, all of a sudden my hard drive disapeared. when I start up the pc all i get is a black screen with the intel logo in the bottom right hand corner, and the writing "press del to run.set up. press TAB to display BIOS POST Message, if i press del the screen freezes on Entering set up the last line is Auto Detecting 3rd Master...., if i unplug the hard drive it will go into set up but will not detect hard drive, I have felt the drive and as far as I can tell it is running, but wont do anything if the drive is plugged in, I am very unknowledgeable so please talk in newbie language,any help will be much apreciated.