When setting up a fresh ubuntu, I accidentally deleted the windows boot partition, now Windows is not available in the boot menu. But through Fedora I still have access to the C drive and I have ad ubuntu live stick and a backup of windows c drive in 2 separate external disks.
I know there are questions on this but I have searched for hours and nothing worked.
Preferably I also do not want to delete the whole disk, only as last thing to do.
Here is what I tried: I tried to download the windows10.iso on fedora and boot it using a tool called ventoy. But when running the iso on it, it says it is broken and can't run. I also tried the ubuntu repair-boot utility using the live usb but it did not find the problem.
71 Answer
Now the only fix after hours of research was to use a live ubuntu usb, download a windows .iso, wipe my whole drive completely and reinstall again.
But this was only the right choice since I have a backup of all OS I use. Whoever encounters that problem should choose this method to safe time and frustration.
