If there are multiple drives installed in the computer, then it can create confusion as to which drive has a Bootloader. This scenario usually happens when Master Boot Record is on the wrong drive.

There are various reasons why Windows does not start. The first assumption is a defect in the boot environment that prevents the system from starting. However, causes can also be a defective file ...

Once done, reboot your PC and check if you see Windows or not. Once done, reboot to see if Windows shows up in the GRUB menu. Overall, these steps should help you boot into Windows after installing ...