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| | Restoring GRUB on a dual-boot Windows/Linux system |
 | | BIOS loads this bootloader program, and then that bootloader begins the process of loading the operating system (perhaps directly, or perhaps loading up another intermediary stage, with more options). |
 | | However, it's able to use the rest of the drive space to hold more elaborate programs, allowing you change the way the system boots, in a variety of ways; and because it's a program on the disk drive, it can be updated, as needed, to suit the changes in disk drive technology. |
 | | The average PC is running a Microsoft operating system, and their bootloader is very limited (deliberately, to some degree), and (usually) only one operating system is supported (theirs). |
| www.cameratim.com /computing/linux/restoring-grub (1773 words) |
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