What to do if windows does not boot?

Question

linux

Hello. Installed ubuntu next to windows 10 (installation of ubuntu bootloader was ssd). But at the very end of the installation, an error popped up. I wanted to switch to windows by holding f11. Chose ssd. The error "reboot and select proper boot device or insert" got out. I tried not through ssd, but through sata. Same error. Reset all bios settings. There was an error , that error disappeared. Now I can only boot ubuntu. What should I do? It is possible even with data loss.

Answer 1

Restore Windows boot is not a problem
BUT I ask you not to put Ubuntu next
to it, it simply does not make sense, if you want to learn Linux, then you have to switch to it and the second system does not work, in fact you will just waste your time.
you must demolish your Windows, put Linux as the main one and prepare for pain and suffering for the next months 3
1. relearn the philosophy of attitude to the OS
2. relearn the software
3. get used to the new conditions and only after that you will really roll.
and such an approach to put the second wasps to poke, this is not an option.
Those who really work with Linux do not ask such simple questions, since the ability to read mana by default is also included in point 1.

Answer 2

Most likely, the bootloader has crashed:
Solution:
https://pureinfotech.com/repair-master-boot-record...
(in the guide, the console opens through the menu. If it is not in the downloaded image, open it via shift + F10 )
If you burn Windows there is no possibility - put ubuntu on a new one and write through it.