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I just uninstalled my Ubuntu partitions and have a problem to delete the GNU GRUB from my computer.

I worked with the How To Geek guide but cant finish the "Fix the Windows Boot Loader" stage.

After I restarted my computer and opened the windows installer and typed:

bootrec.exe /fixmbr

I restarted the computer and got a black screen with the title: GNU GRUB version 2.02 and text:

Minimal BASH-like line editing is supported. For the first word, Tab lists possible command completions. Anywhere else TAB lists possible device or file completions.

I opened linux through my disk-on-key and tried to figure out from where the GNU GRUB came from and I figured that I have alot of partitions: partitions

This time, I changed my BIOS settings and set windows to be the default boot. How can I remove the GNU GRUB from my computer and check if I have another Ubuntu partition on my hardware? (Also, I see that 2 of the partitions on my laptop are from Lenovo)

marked as duplicate by David Foerster, WinEunuuchs2Unix, TheWanderer, karel, Eric Carvalho Nov 28 '16 at 16:20

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    What do you mean by "cant finish the "Fix the Windows Boot Loader" stage"? Why not? What goes wrong exactly? – mikewhatever Nov 27 '16 at 20:55
  • If UEFI which yours is, you have to use efibootmgr to delete UEFI entries & manually delete the /EFI/ubuntu folder in the ESP - efi system partition. Details: askubuntu.com/questions/63610/… – oldfred Nov 27 '16 at 22:52
  • I tried to remove by mount: "sudo mount /dev/sda1 /mnt/efipart Mount is denied because the NTFS volume is already exclusively opened. The volume may be already mounted, or another software may use it which could be identified for example by the help of the 'fuser' command." – BAM Nov 28 '16 at 6:30
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you have to run both:

 bootrec.exe /fixboot
 bootrec.exe /fixmbr

An then restart

  • Still the same black screen: GNU GRUB version 2.02 – BAM Nov 28 '16 at 6:31
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From windows you can try EasyBCD software to remove the linux boot option. In there you can use the "Edit Boot Menu" remove the grub

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