If you have a dual-boot setup with Ubuntu and Windows 10, and you need to reinstall Windows 10, there’s a way to do it without losing your Ubuntu installation. Here’s how:
Install Windows 10 While Preserving Ubuntu
Install Windows 10 using the official Windows installation media. During the installation process, be sure not to choose the Ubuntu partition when prompted to select a drive.
After the Windows 10 installation is complete, boot into an Ubuntu Live CD or USB drive.
Open a terminal and type the following command to reinstall the GRUB bootloader:
textsudo grub-install /dev/sdX
Replace sdX with the designation of your hard drive, such as sda if it’s the first drive. This will ensure that the GRUB bootloader is restored, allowing you to dual-boot between Windows 10 and Ubuntu.
Run the following command to update the GRUB menu:
textsudo update-grub
This will ensure that both Windows 10 and Ubuntu are properly recognized in the GRUB menu.
Finally, you may need to update the BIOS settings to ensure that the dual-boot configuration is properly recognized. 4