A year ago I made a 30GB partition on drive C to install Linux, but I decided to uninstall it months later due to lack of space. I had it with Windows 11.I formatted the partition and added the 30GB back to the space where I had Windows 11.
On Saturday I was using my laptop and it turned off, when I tried to turn it on it didn't turn on and when it finally did, a message appeared that I don't remember very well what it said, I hit continue and the screen was black. It said "GNU GRUB version 2.06 Minimal BASH-like line editing is supported", I typed the exit command, but the laptop just reboots and the same thing appears again.
I tried to put Windows Boot Manager as the first boot option, but it's not there, only Ubuntu and UEFI Hard Drive are found. With the help of a USB where I downloaded Windows 11, I tried to repair the computer by writing bootrec /fixmbr, /fixboot, /scanos and /rebuildbcd in the command line, in /rebuildbcd I got the message "The requested system device cannot be identified because there are multiple non-distinguishable devices that potentially match the identification criteria."
Then I used the commands diskpart and list volume and I realized that the volume labeled DATA is assigned the letter C and the volume labeled OS is assigned the letter D, when before they were the other way around. I changed them again and then assigned the letter M to the ESP and fs FAT32 tag and typed the command bcdboot c:\Windows /s m: /f all. I turned on the laptop again, but the message I mentioned at the beginning continued to appear and Windows still did not appear in the BIOS.
I don't know what is the problem, I contacted Microsoft support, but they told me to contact Ubuntu support team):
