Resolving Dual-Boot Issue: Windows Not Showing in GRUB Menu

I recently encountered a dual-boot issue on my Debian 12 system where Windows 10 was not showing up in the GRUB menu after a Debian update. I spent some time troubleshooting the problem and was able to resolve it. I wanted to share my experience in case others encounter a similar issue. **Issue Description**: After a Debian update, my GRUB bootloader stopped showing the option to boot into Windows 10. Initially, I believed my Windows partition was located at /dev/sda2, but it turned out to be at /dev/sda1.