Widraz
Repetita juvant....

You don't have to uninstall it, you'll have to use the whole disk. There's an option in the installer that essentialy says "Erase everything and use the whole disk for Solus" (don't remember the exact wording but it's there).
The installer will make the rest.
If you know what you're doing you could run Gparted from a live USB, do whatever you want with the disk, and then install to a blank slate

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    • Post #5

    CorvusRuber Yes, I was saying they could use it to write an iso onto a USB stick so that they could overwrite their current install of Solus

      Yes but the problem is when I boot the USB key with the Solus installer on it my computer doesn't launch the installer and just put me on the screen: reboot into firmware. How do I solve that please ?

      Thanks for your answers

        Widraz Have you disabled Secure Boot (or something similar) if your computer has it, that could cause similar problems?

            jwhuettl Yes I disabled it. The USB boot is activated and my USB key is at the first place on the boot list

                Widraz This may be a stupid question, but who did you manage to install it in the first place then?
                Just follow the same steps you did before when you installed alongside the other operating system, but check the option kyrios pointed. Then you'd have everything settled.

                      EQLucky I followed the same steps I did before but it didn't work. And I don't know why

                          It was a dual boot system. I deleted the Windows partition

                            Widraz It was a dual boot system. I deleted the Windows partition

                            How ? Because I'm starting to suspect that something got left behind.....

                            Widraz Yes I set it up with Rufus with the Solus ISO

                            Yes it has been set up properly and yes it's working properly ? Have you tried it on another system ?

                                  Widraz
                                  And that left what on the disk ? We can't go on all day like this, describe in detail what you did, how you did it, on what (ie : hardware specs of your still unknown system) and then perhaps a solution could be found.
                                  Otherwise, a neverending stream of one liner answers we'll get us nowhere.

                                      CorvusRuber

                                      CorvusRuber Here is what I did exactly step by step. I had Solus OS and Windows 10 in dual boot and I prefer Solus OS so I wanted to give the space of theWindows partition to Solus. So I launched Solus, opened Gparted and deleted the Windows partition and Gparted put the me that space as unallowed space. Before that I had prepared a USB device with the Solus ISO prepared on it with Rufus. In the BIOS I allowed USB boot, disabled secure boot and put the USB device as the first one to boot (before my HDD). My PC detects the USB device but just puts on the screen "reboot into firmware". Do you understand better what I did ?

                                      • sgvd replied to this.

                                            If you still have Windows. Try to make a bootable usb with YUMI.