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To Mount the EFI System Partition on the given drive use the mountvol command by using the /S parameter. Look for a blue icon with the label " Windows PowerShell", right click on the that and select "Run as Administrator" within the context menu. Open PowerShell as Administrator mountvol S: /SĮnter powershell into the windows search of the start menu. Remove Boot Loader EFI / System Partion in Windows 10 Quick Guide Type rmdir /S ubuntu to delete the ubuntu boot directoryĪssuming you only ever had two operating systems (Win 10 & Ubuntu) you should now be able to boot directly to Windows without hitting the black grub screen.Type cd EFI and then dir to list the child directories inside EFI.If you are in the right place, you should see a directory called EFI.Type dir to list directories on this mounted EFI partition.While still in the cmd prompt, type: Z: and hit enter, where Z was the drive letter you just created.For convenience, assign a drive letter by typing: assign letter=Z: where Z is a free (unused) drive letter.Select the EFI volume by typing: sel vol Y where Y is the SYSTEM volume (this is almost always the EFI partition).Type list vol to see all partitions (volumes) on the disk (the EFI volume will be formatted in FAT, others will be NTFS).Type: list disk then sel disk X where X is the drive your boot files reside on.Run a cmd.exe process with administrator privileges.(This answer borrowed verbatim from here) Where bootrec /fixmbr, bootsect /nt60 and the Ubuntu live with the boot-repair suggestions have failed, this has worked for me: It is recommended, to use theīCDEdit command " BCDEdit /export" to save a copy of the current system storage before deleting anyĮntries.This answer is for those with UEFI who have deleted the Ubuntu partitions before removing grub

Please note, in case a still required bootloader entry will be deleted, the related OS won't boot anymore.īe sure, to delete only unwanted and not necessary entries.

This document describes how to remove unwanted entries on Windows 10 using the BCDEdit command.

In case there is more than one Windows installation or another type of OS has been installed (for example Linux OS installation) on the computer, additional bootloader entries are created and shown in the boot manager list. BCDEdit synchronizes the firmware namespace object in NVRAM with the system boot configuration data (BCD). On Unified Extensible Firmware Interface (UEFI)-based computers, firmware creates non-volatile random access memory (NVRAM) entries for local devices (such as Optical Disk- or Hardisk drives) when the computer boots.