Windows 10: I need to fix my bootloader/OS without losing my data

I experienced a problem with my Ubuntu live USB that seems to have corrupted or otherwise adversely affected my laptops bootloader and I can no longer boot into windows on the internal drive. Most of my data should be fine if I can recover it (it’s been a few weeks since my last backup) and I don’t want to use Windows recovery if I will lose my data. What should I do?

submitted by /u/Creat0rByte
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:)

 

How To Fix The Windows 10 Bootloader

THANK YOU. This solved it. I think this was mentioned earlier by you or someone else perhaps but I've messed around with it enough now where I vaguely understood what the commands were doing. I actually had to delete the partition, recreate it, and re write the BCD as you suggested in Step 3.

Shoutout to @topgundcp I'm sure that last method you suggested would have worked too, but now I understand how to do it manually, so I learned something.

Also, thank you @NavyLCDR for your help as well.

I have ONE last question, any SAFE way to remove the old ubuntu EFI entries that are present in my UEFI as boot options?

edit: Nvm, figured it out. For anyone else wanting to know how to remove old EFI boot entries, use "EasyUEFI" it is super easy. Took like 10 seconds after install. I DID have two identical looking EFI's for my samsung ssd, one of them, in the details, showed that it had no file path. I assumed that was my old broken one and deleted it, must have been correct bc my computer boots up perfect.

Thanks!!!

 

Prevent Windows from overwriting other OS's bootloader

Hi! Just as the title suggests, I'd like to prevent Windows from overwriting the bootloader.

Currently I have several operating systems (none of them being Windows) in my computer and all of them are managed by a single bootloader which installed on the SSD, but I'd like to know:

1) If I install Windows (again), is the same thing going to happen?

2) Is there any way to prevent Windows from 'telling' the motherboard to select Windows instead of my already selected bootloader?

My perfect scenario would be:

1) I install Windows on my hard drive

2) I can press F9 or the 'boot menu' key and then select the hard drive on which I installed Windows to boot it.

3) If don't press anything, the computer will boot to grub/systemd boot or whatever my bootloader is to let me choose which OS I want to boot.

And not this:

1) I install Windows on one of my hard drives

2) Windows automatically boots, overwriting the content of the current disk that contains the bootloader.

Thank you.

 

vista bootloader problems

I've explained this so many times...

Basically if you use Vista and Linux, you are stuck with the Vista bootloader. It's only a bootloader. I had XP, Vista and Linux all running out of the Vista bootloader with no issues.

A Bootloader is nothing more than a tiny bit of software that allows you to choose which set of commands/OS to launch.

You want to use Ubuntu and Vista, you've gotta use the Vista bootloader.