I have recently bought Acer Aspire E5-573G-57HR and decided to install Ubuntu instead of completing the installation of the preinstalled linpux linux. However, after succesfully completing the process, I was prompted to restart the computer. So when the computer turned on again (with USB still plugged in), I was given the same 4 options as before: see the preview of ubuntu/install it/manufactur installation/disk check... If USB in plugged out, the computer says that there is no booting device. What do I have to do to normally access the operating system?
Thank you for your help, Eva