I'm running an older Dell XPS Gen 2 series, 3Ghz, 2gb ram, SATA 120GB drive. It was working fine this morning, but after a restart, windows would give me UNMOUNTABLE_BOOT_ERROR when Windows was loading. So, I went into setup, found my hard drive, computer was recognizing it from there. I rebooted, and tried again.. same error. I got my windows xp CD, put it in the drive, booted to the disk and tried a repair. I got an error saying that windows could not find a hard disk installed on my PC. I turned everything off, checked my cables and power, hooked it all back up, turned the computer on and had the error again. So I then attempted to install windows OVER the previous partition, but again, Windows cannot find a hard disk installed on your computer. Any help with fixing this problem would be greatly appreciated, as I really can't afford a new system right now and would love to save this one if possible. Thanks!