No bootable device

I have Acer Aspire F5-571-50S0
After the last update of windows 10, I was unable to connect to wifi. Probably some driver was acting up. So I contacted microsoft.
While their technician was working on my laptop (downloaded and run some BIOS file) suddenly laptop restarted and then started showing "No bootable device".
I changed the harddisk incase if hard disk has gone bad but even after putting new hard disk there's no change.
I tried to open BIOS setup and set all default settings too but didn't work.
BIOS setup is detecting the new hard disk so it's confirm that hard disk is fine and there's something else that's not working.
How should I fix this?

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christy1

Hi @Kramsha00,

Forced shutdown your system by pressing the power key for little longer.
Now restart your laptop/desktop.
Press F2 key repeatedly and go to BIOS setup.
Now go into main and F12 Boot Menu: Enable.
Now to go Boot option/menu and change the boot mode from UEFI to Legacy.
Press F10 key and save and exit.
And now reboot your system

:-tried to get into advance option Using Alt+F10
Step:
If you are using a Windows 10 (or Windows 8.1, Windows 8) installation media, select Troubleshoot and then Command Prompt.

If you are using a Windows 7 installation media, in System Recovery Options, select the first item and then select Windows 7 as the operating system. Then click Next.

Click Command Prompt.

Command Prompt, type the following lines one by one and hit Enter after each. (If you are asked whether you want to add a new installation to boot list, press Y and then hit Enter.)

bootrec /fixmbr
bootrec /fixboot
bootrec /scanos
bootrec /rebuildbcd

Step 6. Shut down the Command Prompt window and reboot your

JackE

>>>While their technician was working on my laptop (downloaded and run some BIOS file) suddenly laptop restarted and then started showing "No bootable device".>>>

Hold on! Did you connect to the router by wire if wifi wasn't working? Do you mean the MS tech was trying to flash the BIOS remotely? Jack E/NJ

Sharanji

Kramsha00

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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