How to restore windows if the bootloader does not see it?

Question

linux

I have two disks, one contains Windows 10, the other, empty, had to install Manjaro, installed via live USB. At some point, instead of the OS selection menu, the grub rescue console began to appear. At that moment, I thought that I accidentally deleted the boot (although I didn’t seem to touch it) and just again, via live USB, put another distribution on the same disk. During installation, it, in theory, formats the disk, I thought that this was enough, there was no important information there. The current situation is this: UEFI starts up normally, there are three boot options - the disk on which Windows is installed, manjaro and ubuntu (the latter on the second disk). When I try to start Ubuntu everything works fine. When you try to start Windows (well, or erased Manjaro), the grub rescue console appears. Through ls you can see (hd0), (hd0,msdos1), (hd2), (hd2,gpt1) and the rest. See what's there it doesn't work anymore, something is wrong with the file system. Ideally, I would like to bring the computer to the same state as before installing manjaro, so that when installing another OS on the second disk, there would be no problems somehow related to all of the above. At hand is a flash drive and another PC on windows. Thanks in advance.

Upd. Installing in update mode did not help, just reinstalled Windows. Now it loads, but only from the boot menu, otherwise the error 0xc000000e will appear.

Answer 1

Start installing Windows 10 in update mode, keeping your current personal data.

Answer 2

Deeply study the boot process of different OS, and there will be no such problems in the future.