GRUB failed to install to the following devices:                                     │
                                                             │                                                                                      │
                                                             │ /dev/sda                                                                             │
                                                             │                                                                                      │
                                                             │ Do you want to continue anyway? If you do, your computer may not start up properly.  │
                                                             │                                                                                      │
                                                             │ Writing GRUB to boot device failed - continue?                                       │
                                                             │                                                                                      │
                                                             │                        <Yes>                           <No>