At the boot menu on live usb hit e or tab to see what boot options the live usb is using and edit grub accordingly to see if that will get you past the black screen.

Because he can't boot windows, actually he can't boot the installed Mint either according to the initial post. If you take a closer look at the unetbootin site, you will see that they have separate downloads for people using windows, Linux and also a third for Macs so downloading the Linux unetbootin would be the way to go booting from the usb with Mint.

Before you get into the re-installing, what happens when you set the windows drive to first boot priority? You said it didn't boot but do you see any messages on-screen or is that just a black screen also?

You could try the suggestion by colorpurple21859 above and maybe add nomodeset to the end of the line beginning with linux but I don't know if you even see the grub screen.

Have you used unetbootin before? If not, be sure to read the instructions before beginning and make sure you download from the Download (Linus) tab.

https://unetbootin.github.io/

After downloading unetbootin, go to the Ubuntu site and download whichever iso you want and follow the steps for using unetbootin on their page. You need to make sure you select the correct drive, it might be sdd but you should be able to tell by using: sudo fdisk -l which will show the size of the various drives. If you successfully use unnetbootin, you should see a message to that effect so re-boot and make sure you change the boot priority in the BIOS to boot the Ubuntu usb drive. There are multiple ways to do this depending upon your hardware but you seem to know how to access the BIOS. If you are using a Sandisk for the Ubuntu flash drive and see two options for Sandisk in the BIOS, make sure you select the one which says UEFI.

If you are planning to also install windows, you might do that first although I don't know how significant that is with UEFI. If you re-install both, you need to install both EFI/GPT or both MBR/CSM. Mixing causes boot problems. I've not install windows 10 on a UEFI machine so don't have any advice in that regard.

If you think you would like to try to repair your Mint install rather than go through the above process, you could boot the Mint usb and go to the site below and get the 'boot repair' software. Use the 2nd option, using the pa as it is more current. If you choose to run boot repair, select the option to Create BootInfo Summary and do not try to make any repairs. You can post a link to the output here as it will give a lot of details on your system and someone may have a suggestion to repair the systems.

https://help.ubuntu.com/community/Boot-Repair

To fix windows boot you may be able to hit one of the f-keys to get into recovery mode, or download and use windows 10 iso.

I think you found out just how powerful the "dd" comand is. sorry to see this happen.

Hi, i had problems with mint 18.2 not reconginising my windows partition. So i eventually got rid, my machine then struggled to boot. I edited /etc/default/grub and deleted "quiet splash" from the GRUB_CMDLINE_LINUX_DEFAULT line. There appears to be a bug in 18.2 where the graphics card doesn't wake up on boot

that's it problem solved I did what is quoted above. I succeeded make ubuntu bootable usb and installed on the hard disk than I used woeusb To Create Bootable Windows USB Stick and then I format the hard disk and now windows back


Thank you all for your help The Linux community is the most supportive community I have ever seen in my life.

Cool! Yup, that's the LQ I know

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For other future searchers who find this (and maybe if you want to try it too)
I 'preach' VirtualBox.org, as a quick/simple/safe way to try (or even run) Linux.
A couple advantages are: no fighting drivers&uefi; can web-browse (work)
while Linux (guestS) is/are booting (or even dead)!!!

Enjoy the World of Linux