I have a 2004 Dell Dimension 3000 series, with Windows XP SP3 OS. It's used and had already had its issues when I got it. I'd done a format and reinstall on it a few weeks ago and that seemed to fix it up. But now, it will boot and then it says "Primary drive 0 not found," and I've tried booting it from the disk, but it also says it has no hard drive. Why is this, and what can I do?