unable to reset, unable to boot from USB despite having changed the boot priority

Zuluvres

After a virus attack that installed uncontrollably new programs without having been prevented by Windows Defender, I did a hard reboot to my Acer Aspire Switch 10e. Right after that, the machine went to an endless loop of automatic repair but it couldn't repair the PC. I've tried to use a WIndows 10 USB installer to reinstall the PC, but it said "system doesn't have any USB boot option". There was only WIndows Boot Manager in the boot option menu. USB option was available in the BIOS, and I have change the booting priority to USB first in the BIOS, but the same thing happened again. I've tried to reset the PC to no avail, the same with 'system restore', 'go back to the previous version', 'system image recovery', and  'startup repair'.  The only option available is now through the command prompt.Any idea on how to reinstall Windows 10 in this case?
Thank you!!

Sharanji

Zuluvres 

The problem could be with the formatting option of Rufus. It needs to specifically be set to GPT partition scheme for UEFI, and FAT32. The new version keeps defaulting to other setttings, which does not work.
Was the USB Win10 installation drive GPT or MBR partitioned?

When you used rufus did you make it a bootable Win10 iso image using (1) GPT FAT32 for UEFI only (2) MBR FAT32 for UEFI only or (3) MBR for both BIOS & UEFI?  You need to choose (1) step.

Try to create a bootable USB drive and boot the device.
For windows 10, You can download the iso file of your edition from microsoft and use Rufus to create a bootable USB drive and install the OS, Windows will install most of the drivers, if you need any drivers, you can download them from Acer support site.
https://www.microsoft.com/en-gb/software-download/windows10
https://rufus.akeo.ie/

Reloading Windows with the Media Creation Tool:

Press and hold the Power button for five seconds to turn off your computer. Plug in the USB Drive that contains the Media Creation Tool files.

Power on the system and begin tapping the F2 Key to enter the BIOS. In the BIOS, use the arrow keys to navigate to the Main menu item at the top.

Use the down arrow to highlight F12 Boot Menu and press Enter. Highlight Enabled and press Enter.

Press the F10 key and press Enter to save the changes and exit. The system will reboot immediately.

As soon as the system begins rebooting, press the F12 key repeatedly to enter the Boot Manager.

Select the USB HDD and press Enter. The Windows Setup environment will launch. Select your Language, Time and Keyboard, then click Next.

Click Install Now. Accept the license terms and click Next.

You will be prompted with choices and follow the onscreen instructions. Using recovery option will erase all personal data.

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