The Boot Loader

During installation, Ubuntu automatically installs GRUB2 (Grand Unified Boot Loader) to the Master Boot Record (MBR) of your hard drive. Handily enough, it also detects any other operating systems, such as Windows, and adds entries in GRUB2 as appropriate. If you have a specific requirement not to install GRUB2 to the MBR, you need to install using the Alternate disc, which enables you to specify the install location for GRUB2.

Dual Boot Not Recommended, but You Can Try It If You Want

If you are attempting to create a dual-boot system using both Windows and Ubuntu, where multiple operating systems exist on the hard drive and the user selects which one to use at boot time, you should install Windows first because it will overwrite ...

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