To create a bootable Windows 10 USB on a Linux system with a graphical user interface (GUI), you can use the Startup Disk Creator utility provided with Ubuntu and other Debian-based distributions.
Insert the USB drive you want to use as the bootable USB into your Linux system.
Open the Startup Disk Creator utility from the main menu or by running the following command:
usb-creator-gtk
Click the "Other" button and browse to the location of the Windows 10 ISO file on your system.
Select the USB drive you want to use as the bootable USB from the "Device" dropdown menu.
Click the "Make Startup Disk" button.
Click the "Yes" button when prompted to confirm that you want to create the bootable USB.
Wait for the process to complete. This may take several minutes depending on the size of the ISO file and the speed of your USB drive.
Once the process is complete, close the Startup Disk Creator utility and remove the USB drive from your Linux system.
You can now use the USB drive to boot and install Windows 10 on a compatible system. Make sure to follow the instructions provided by Microsoft to complete the installation process.
Keep in mind that creating a bootable USB will erase any existing data on the USB drive. Make sure to back up any important data before creating the bootable USB.