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I want to install Ubuntu 16.04.2 with Windows 10. I created partions for home , root and swap. After clicking Install, I got following error. Note: My partition table type is gpt. But cliking F2 , I come to BIOS,not to UEFI.

The partition table format in use on your disks normally requires you to create a separate partition for boot loader code. This partition should be marked for use as a "Reserved BIOS boot area" and should be at least 1 MB in size. Note that this is not the same as a partition mounted on /boot.

If you do not go back to the partitioning menu and correct this error, boot loader installation may fail later, although it may still be possible to install the boot loader to a partition.

How to solve this problem?

  • There is an option in your bios to press f2 or del to resume in to UEFI. – Mudit Kapil Jun 22 '17 at 6:32
  • Ok. But what to do? Opening UEFI and install ubuntu? – user202912 Jun 22 '17 at 6:34
  • When trying to install Ubuntu, your computer is booted in BIOS mode, and it wants to install Ubuntu in the same mode (not UEFI mode). Is this what you want? In that case please create a "Reserved BIOS boot area", a small partition with the bios_grub flag. See this link, help.ubuntu.com/community/DiskSpace. Otherwise, if you want to install Ubuntu in UEFI mode, you must first boot the computer in UEFI mode. Things are more convenient with Ubuntu in the same boot mode as Windows, and if Windows 10 was installed by the manufacturer or vendor, I think it is installed in UEFI mode. – sudodus Jun 22 '17 at 6:36
  • @sudodus I've installed Windows 10 through BIOS,not UEFI. What do you recommend to do next? I've already created partions for home,root and swab? What to do with them? – user202912 Jun 22 '17 at 6:40
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    @user202912 -- exit the installer. boot the live CD "try ubuntu". make the partition using gparted. set the flag. then restart the installer. – ravery Jun 22 '17 at 7:15
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I am writing an answer in order to include a screenshot, to make things easier to see.

When trying to install Ubuntu, your computer is booted in BIOS mode, and it wants to install Ubuntu in the same mode (not UEFI mode). Is this what you want? In that case please create a "Reserved BIOS boot area", a small partition with the bios_grub flag. See this link,

help.ubuntu.com/community/DiskSpace

Otherwise, if you want to install Ubuntu in UEFI mode, you must first boot the computer in UEFI mode. Things are more convenient with Ubuntu in the same boot mode as Windows, and if Windows 10 was installed by the manufacturer or vendor, I think it is installed in UEFI mode.


The flag is not a file system. Do not make any file system. Instead right-click on the partition in gparted and select 'Manage Flags'. Then you get a menu, where you can select the correct flag. I think this screenshot will help.

enter image description here

  • Thank you, but there is problem that I've taken 2mb space from disc D and set it to ex4 file system. Was it wrong? But then I flagged it as bios_grub. Then Ubuntu installed successfully,but there is no selection menu to choose Ubuntu. What to do? Please help – user202912 Jun 22 '17 at 8:06
  • grub has to be installed to the MBR of the drive that your computer boots from – ravery Jun 22 '17 at 8:13
  • If things do not work, I suggest that you remove the file system from the small partition with a bios_grub flag. There should be no file system. You can do that in gparted by selecting 'Format to' and select 'cleared', which means no file system. After that you can either reinstall Ubuntu or repair the bootloader (which is much faster, but maybe more complicated to do). – sudodus Jun 22 '17 at 8:14
  • @ravery How to install grub to MBR? What I forgot to do? – user202912 Jun 22 '17 at 8:17
  • possibly, but I alsothink he hasn't overwritten the windows bootloader. when prompted where to install grub he needs to select sda (the master MBR). not sda4 (or which ever partition that ubuntu is installed on – ravery Jun 22 '17 at 8:17

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