Trouble with GNU Grub (Linux)

[suchamoneypit]

So some backstory, I had windows 10, installed Mint-cinnamon in a dual boot by manually partitioning it. Got it working fine, but didn't like it. Here is where I made a mistake, to remove it, I simply deleted the partitions. I still boot into grub, but now into GNU GRUB. the problem is that here, I'm unable to boot into USB anymore to use boot repair or other troubleshooting, but if I exit it goes into windows. The weird thing is is I was able to boot from USB for a while by hitting F12 on startup, and I tried installing Ubuntu, which failed due to no EFI partition, and boot-repair failed because I wasn't in EFI mode. While USB booting was working I also tried using the windows 10 installation media to repair my startup, which also failed for unspecified reasons. Ive also tried restarting and opening up the command prompt, and tried to clear the MBR which said work successfully but I still boot in GNU Grub. I've spent like 5 hours on this issue and googled everything and tried everything.

 

Could someone please assist me on how to completely remove GNU Grub. get my PC to what it was before, allowing me to attempt to install Ubuntu?

 

EDIT: I forgot to mention, another problem is my motherboard logo pops up , and then goes straight to grub. It does not allow me to press F12 anymore.

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[elkenrod]

Try "Delete" or "F11"

 

also,

 

What kind of motherboard do you have?

[suchamoneypit]

Try "Delete" or "F11"

 

also,

 

What kind of motherboard do you have?

im using a X99-UD4, when i get home ill try your suggestions.

[Kiyuubi]

Put in a Windows installation media and click the "repair" button.  The startup repair should fix it, but if it doesn't, go to command prompt and type:

bootrec.exe /fixmbrbootrec.exe /fixbootbootrec.exe /rebuildbcd

[suchamoneypit]

 

Put in a Windows installation media and click the "repair" button.  The startup repair should fix it, but if it doesn't, go to command prompt and type:

bootrec.exe /fixmbrbootrec.exe /fixbootbootrec.exe /rebuildbcd

I tried the first two commands, the third one I havent tried before, I did the commands but on the third one it says no windows installation found.

 

Also, im home and tried using Del and F11, they do not work. The normal key is F12, I've done a bunch of overclocking before and pretty familiar with my bios.

 

Its also worth nothing that from where i repair my startup (which doesnt fix the issue) Where i can select to boot from a device, If i select my boot-repair USB for example, It restarts, loads GNU grub, i hit exit, and then it boots into windows and ignores the USB.

[Kiyuubi]

I tried the first two commands, the third one I havent tried before, I did the commands but on the third one it says no windows installation found.

Are you sure you didn't delete your Windows installation? Can you boot to a live version of Linux and verify your files are still there?

[suchamoneypit]

Are you sure you didn't delete your Windows installation? Can you boot to a live version of Linux and verify your files are still there?

im booted into it right now

 

If i type "exit" in GNU Grub it just boots into my windows. The problem is its annoying to do everytime I boot and it prevents me from accessing my BIOS which isnt good, as well as stopping me from installing Ubuntu.

 

I cannot boot into a live version of Linux because I cannot boot to a USB.

[DacStugly]

Since you have deleted your linux partition that leaves very few options for recovery. (Similar to what my nephew  did to his Lenovo laptop).
Before attempting any of these please ensure to backup your data on the HDD./SSD

 

1. Disconnect the boot HDD/SSD from the PC

2. Start the system and you shoud post and be able to enter into your hardware UEFI

3. Disable UEFI/Enable legacy BIOS boot options.

4. Boot into a live USB to make sure it works

5. Connect the HDD/SSD and boot into Live USB

 

From here you got options.

 

1. use GPARTED from the LIVE USB to and re-partition your HDD/SDD first then  enable UEFI  and  install a fresh copy of Win8.1

2. Install Ubuntu without UEFI support and enable it later (might have o install additional packages during install process)

3. Use the the LIVE USB/Win8.1 installation media to remove  GRUB and edit GPT and EFI cert

 

Just google to find out how to use any one of these options.