NAVIGATRIX

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GRUB Boot Manager does not show Windows option in boot selection menu

When you install Navigatrix alongside Windows (choosing option 1, “Install Navigatrix alongside” in step 3 above) it will also install “GRUB” the “Grand Unified Boot Loader/Manager”. GRUB installs itself into your systems “Master Boot Record” (or it's UEFI/GPT equivalent if you have a new computer that shipped with Windows 8). When your computer now boots it launches GRUB rather than an operating system. GRUB then asks you which operating system you actually want to boot (Windows or Navigatrix) and launches the operating system of your choice.

There have been cases where - once you reboot your computer after installing Navigatrix - GRUB only shows a single entry for Navigatrix as a boot option and entry for Windows. Should you encounter this issue it can easily be fixed via the GRUB Customizer which is available (with installation instructions) here: http://navigatrix.net/viewtopic.php?p=1200#p1200. Download the package, install it under Navigatrix on your harddrive, and then launch it from the Manta Menu under Preferences->Grub Customizer.

GRUB Customizer in Manta Menu

To launch the GRUB Customizer you will have to enter the password which you set up during the installation. Once the GRUB Customizer is up, it will automatically scan your harddisk for bootable operating systems. When that is completed it should show entries for Navigatrix and Windows (plus some other stuff like “memtest” which you can ignore at this point). Simply press “Save” and exit the GRUB Customizer. The next time you boot, the GRUB selection menu should give you a choice between Navigatrix and Windows.

( http://navigatrix.net/nxdoc/03_installing_nx.html in fondo alla pagina )

Ciao