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6.14.3. Upgrading Boot Loader Configuration

Your completed Fedora installation must be registered in the boot loader to boot properly. A boot loader is software on your machine that locates and starts the operating system. Refer to Section 6.23, “x86, AMD64, and Intel® 64 Boot Loader Configuration” for more information about boot loaders.
If the existing boot loader was installed by a Linux distribution, the installation system can modify it to load the new Fedora system. To update the existing Linux boot loader, select Update boot loader configuration. This is the default behavior when you upgrade an existing Fedora or Red Hat Linux installation.
GRUB is the standard boot loader for Fedora. If your machine uses another boot loader, such as BootMagic™, System Commander™, or the loader installed by Microsoft Windows, then the Fedora installation system cannot update it. In this case, select Skip boot loader updating. When the installation process completes, refer to the documentation for your product for assistance.
Install a new boot loader as part of an upgrade process only if you are certain you want to replace the existing boot loader. If you install a new boot loader, you may not be able to boot other operating systems on the same machine until you have configured the new boot loader. Select Create new boot loader configuration to remove the existing boot loader and install GRUB.
After you make your selection, click Next to continue.