I currently have CachyOS installed on a gaming laptop, but it has not worked out and I would like to switch back to Windows 11 for a while. I have installed Linux before, but I have never reinstalled Windows and would appreciate a beginner-friendly explanation of the process, including how to create the installer USB, boot from it, and handle the existing Linux partitions.
3 Answers
If the laptop originally came with Windows 10 or 11, its activation is often tied to the hardware, so Windows may activate automatically once it is online. Otherwise, you may need a valid product key. You normally should not need to disable Secure Boot for a current Windows 11 installer; leave it enabled unless the laptop specifically refuses to boot the installer. Also make sure the system is set to UEFI mode rather than legacy BIOS mode.
Before starting, save your personal files and check whether you need any Linux-only data, encryption keys, browser profiles, or game saves. It is also worth downloading the laptop manufacturer’s network and chipset drivers in advance in case Windows does not immediately recognize all the hardware. After installation, run Windows Update and install the manufacturer’s remaining drivers.
Download the Windows 11 ISO from Microsoft’s official download page. From Linux, use a tool such as Ventoy or WoeUSB to create a bootable USB drive; you’ll generally want at least an 8 GB drive. Back up anything important first, because deleting the existing Linux partitions during setup will erase the data on them. Restart the laptop, open its one-time boot menu using the manufacturer’s key, and select the USB drive. In Windows Setup, choose a custom installation, select the internal drive, remove the old Linux partitions if you want to use the whole disk, and install Windows into the resulting unallocated space.
If you use Ventoy, you can usually just copy the Windows ISO onto the prepared USB rather than writing it directly. Double-check the drive selection before deleting anything, since the wrong choice could erase another disk.