Enter UEFI (BIOS) with F2 once Acer appears. Install Ubuntu (it worked with 18.04 and 20.04) from a USB drive. One therefore needs to fiddle in the UEFI (BIOS) configuration to make an Ubuntu-only installation bootable: But after installing Ubuntu and formatting the HDD in the process, an error appeared at boot-up: "Default Boot Device Missing or Boot Failed", or "No Bootable Device", probably once the UEFI/BIOS has been cleared. I first had dual-boot for a couple of years, but then wanted to delete Windows and recover that partition. 
Use F5 or F6 key to change the order to USB.Further to Piyush, this is also how I solved this problem on my Acer Aspire e5 575. Now go to the Boot by selecting with Right Arrow. Press the power button and press the F2 button as soon as the Acer logo appears. Now connect the bootable USB stick to the port. The process will automatically start and in case the installation doesn’t complete you can reformat USB as FAT32.ģ. Change boot-order to boot from USB in Acer Aspire One. Target the USB drive on your Acer Aspire One and click on OK. After selecting the Linux Distribution or ISO file Format your USB drive as FAT32. To use already downloaded ISO file select the disk image option and provide the location of the file by clicking “…”. UNetbootin installs the Linux Distros ISO files for you if you want to use your own downloaded ISO file then follow instructions below,. 
To create a Bootable Live USB drive follow the instructions below, Download UNetbootin for Windows UNetbootin enables you to create a bootable USB drive for the Live operating system for Ubuntu and other Linux distributions. Acer Aspire One Boot from USB using Unetbootin
Finally, start the process and this software will automatically format and create a bootable USB flash drive.Ģ. Make sure all three options including Quick Format, Create a Bootable disk using and Create extended labels and icon files are selected. The default Cluster size option should be selected. 
For the Filesystem select NTFS option and select if your PC has UEFI bios then select FAT32. Select the MBR partition scheme for BIOS or UEFI and If your laptop has UEFI bios then select the other two options. After installing Rufus simply select the ISO file from the file manager and accept all settings when the popup window appears. Acer Aspire One USB using Rufus Download Rufus Ways to Boot From USB in Acer Aspire One 1. CD has wider support and USB boot functionality is not available for may operating systems. Booting from USB is depended on the Hardware such as BIOS, motherboard and flash drive model as it may be working with one computer and refuses to another. No need to purchase any blank CD and you can fill your own stuff along with the ISO file. There are many advantages of Booting from USB over other booting options such as DVD and other which are discussed below,
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