All this is assuming you can still boot into Windows 11/10 in a regular way. If you cannot, the only way is to use a bootable USB drive. You can then use the advanced recovery. Reset Windows Format ...

If you want to change your default hard drive from C: to D:, read this post. We will guide you through the step-by-step process of doing this on a Windows 11/10 PC. By default, Windows installs ...