boot_repair.md

1. Boot to live ubuntu

2. Open Terminal

3. Write these commands one after another

    sudo add-apt-repository ppa:yannubuntu/boot-repair
    sudo apt-get update
    sudo apt-get install -y boot-repair && boot-repair
   

4. Choose the recommended repair

5. Don't upload to pastebin

6. Wait several minutes to complete the process

That's all.