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Soooooo, I seem to have myself in a very particular situation. Let me start from the beginning, I set up dual boot with Windows 10, and Lubuntu. Everything went according to plan. I then decided that I wanted to remove dual-boot. I looked on several articles some saying to use bootrec.exe, to repair and remove it but then I realized "It doesn't use the windows boot manager... it uses grub." So with this knowledge I searched for guides on how to remove grub. I found a guide (http://linuxbsdos.com/2015/09/05/how-to-delete-grub-files-from-a-boot-efi-partition-in-windows-10/) I could not access my system drive, so I dual-booted into Lubuntu and used root to access the EFI folder and deleted the "ubuntu" folder and rebooted to a happy little message saying: Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key_ . I realize that all my data is still there. I realize that in deleting the "ubuntu" folder that I deleted critical files part of the loading of grub. I now need to somehow replace these files, and get back to Windows 10.

Sidenote: I don't have bootrec.exe as a command. I checked this before I deleted the grub files.

Thanks for the help, -r

ricky gonce
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I will recommend you to first reinstall GRUB using a Live USB/CD of Lubuntu and then repair your boot drive by using Boot Repair. Follow the steps on link provided and then use bootrec.exe to achieve your goal.

You can follow these steps

Installing Boot-Repair

sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install -y boot-repair && boot-repair

Using Boot-Repair

Recommended repair

launch Boot-Repair : type "boot-repair" in terminal.

Then click the "Recommended repair" button. When repair is finished, note the URL (paste.ubuntu.com/XXXXX) that appeared on a paper, then reboot and check if you recovered access to your OSs.

If the repair did not succeed, indicate the URL to people who help you by email or forum.

pandafy
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  • I don't have bootrec.exe as a command... it is not reconized as a command. Not only that but would Lububtu even have an option to reinstall grub? or should I just reunstall Lubuntu to its current partition, would that reinstall grub? – ricky gonce Dec 28 '17 at 16:13
  • bootrec.exe would be the next step which is a function provided in Windows. First reinstall GRUB, by any means so atleat you will have a working PC and you can boot into Windows. Then follow the steps given in the provided link.

    P.S.: Go through provided link first.

     – pandafy Dec 28 '17 at 16:34
  • Is there an option to reinstall GRUB using Lubuntu? I doubt there is. In that case should I just reunstall Lubuntu to its current partition, would that reinstall grub? – ricky gonce Dec 28 '17 at 16:37
  • As provided in my answer go to Boot-Repair link and follow thoses steps. You can aslo install GRUB through command line in Lubuntu

    sudo apt install grub-pc grub-pc-bin

     – pandafy Dec 28 '17 at 16:38
  • When running the install command on a live usb of Lubuntu it says that it is already on the latest version, and doesn't do anything... – ricky gonce Dec 28 '17 at 16:54
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    Thank you for your link to boot repair, I now have access to windows. – ricky gonce Dec 28 '17 at 17:05
  • You are requested to follow conventional way(one mentioned in forums and in the link provided) to remove Lubuntu from your system. – pandafy Dec 28 '17 at 17:07