36 hours ago
Ubuntu 20.04 and Windows 11 Insider Preview are installed on my ASUS TUF DASH F15 laptop in dual-boot mode with GRUB bootloader.
Since I left the Insider Program, I want to reinstall Windows 11 from the official .iso image.
My / partition is mounted on the same SSD drive as :C partition for Windows.
How can I safely reinstall Windows 11, while keeping Ubuntu on-place and safely boot on both systems with GRUB?