I have a dell Optiplex and the other day it froze, and shut off. when rebooted it showed the windows XP loading bar as usual and then gave me a blue screen of death. Saying [unmountable boot drive] so I rebooted it a few times and still got the same result. From research I have done I have discovered this usually is the sign that the hard drive is either dead or the operating system is badly damaged. I ran Windows XP Recovery and did CHKDSK and nothing was found, I put in new Boot sectors still no luck. There was nothing important on the system, I am considering installing a new hard drive with a fresh installation of windows XP. Any thoughts or advice would be greatly appreciated thank you!! Patrick