After some troubles with the boot of this PC, now I'm faced with another challenge --- I can't access the external hard disk that is usually plugged in this PC. Everything else in this PC works fine before it started not booting. After several attempts on fixing the computer's boot, it came to a point where the PC can detect the external HD but I can't gain access to it. I have a Western Digital external HD and I'm using Windows 7 Ultimate 32-bit as OS. Whenever I plug the External HD, the option to unplug it at the bottom-right of the screen appears (which meant the PC recognized it) and it appears at the disk management as 'Disk 1' while Disk 0 is for the main HD. But the volume for Disk 1 doesn't show. I only see C: on the disk management screen.