I have been using /abusing a duel boot system for about 10 years, upgrading and changing what OSes I’ve been using but always having a windows install going. After some changes and a new rig, I was setting up the old system as a server and decided to use just windows as this was for a games server. As it was installed on it’s own drive, I pulled the rest and now all I get when trying to boot off the drive is the grub command line. Also I have to select the drive in the bios to boot as it won’t let me priority boot to it.
Is there a way to fix grub or uninstall it? And why does the bios not recognize the drive as bootable anymore?
Oh, sorry I misread. Yes I think you would need to update grub using a live usb as suggested above. However for what you want to achieve, maybe try using a windows boot disk/usb - ‘repair system’ - might fix windows bootloader and circumvent or erase grub.
Well after trying way to many things that didn’t work, I found this post (found below) and after following it I don’t seem to have grub anywhere. I have no idea what the last 2 commands are for and the last one didn’t even work. Atleast windows loads now and does so through restarts.
Boot from the Windows 10 Installation USB flash drive. At the first screen, press Shift + F10 to open a command prompt. Run: diskpart list vol <- judging by the sizes listed and possibly the label, figure out which one is your installed Windows partition, also note which drive letter it looks like the USB flash drive is assigned select vol # <- replace # with the actual volume number of your installed Windows partition active exit X: <- change this drive letter to the drive letter of the installation USB flash drive. CD \boot bootsect /nt60 C: /force /mbr <- change C: to match the drive letter of your installed Windows partition you found in diskpart bcdboot C:\Windows /s C: /f ALL <-Change both C: to match the drive letter or your installed Windows partition exit
Exit setup by clicking the red X in the upper left corner of the Window. Remove the USB flash drive and reboot your computer.