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I have successfully installed Ubuntu on my PC with dual boot alongside Windows 10. However, I noticed that there are two partitions for Windows 10 when I start my PC.

Screenshot of Start Screen

How can I remove one of them without affecting my installations or the integrity of my HDD.

PercySherlock
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  • UEFI boot entries aren't partitions. – ChanganAuto May 11 '21 at 19:18
  • @ChanganAuto Forgive my ignorance. How do I remove one of the dev/sda? – PercySherlock May 11 '21 at 19:20
  • Not that either! Do you really want to remove an entire physical drive? I don't think so. Honestly, I suggest you keep things as they are because at least one of them boots Windows, right? You have tested it already, right? Of course, there are tools to cleanup EFI but one wrong move and the result is one or both OSes unbootable. You may try running sudo update-grub in Ubuntu. IF it stays the same then please edit your question and post the results of efibootmgr -v – ChanganAuto May 11 '21 at 19:27
  • More info: https://www.linuxbabe.com/command-line/how-to-use-linux-efibootmgr-examples – ChanganAuto May 11 '21 at 19:28
  • That looks more like BIOS/MBR configuration. And Windows has a Boot partition with boot files. Some users do not know those files are essential to boot & delete that partition. Boot-repair and maybe other tools then copy the boot files as backup into main or c: "drive" partition. Then grub finds two sets of boot files as it just looks for files not boot flag, like Windows does. if you really only want one entry, copy one entry into 40_custom & turn off os-prober. https://askubuntu.com/questions/659528/grub-menu-with-windows-10-and-ubuntu-14-04/659910#659910 – oldfred May 12 '21 at 02:34

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