PC ran into a problem and needs to restart

I had upgraded my Acer Aspire Laptop (CORE i5 - 4GB RAM) from Windows 8.1 to Windows 10 recently. As it was running very slow, I decided to do a 'clean reset'. By mistake, the recovery partition also cleaned. It then went to a blue screen saying "Your PC ran into a problem and needs to restart. We'll restart for you" and appeared the error code INACCESSIBLE_BOOT_DEVICE, and it is keep on restarting again and again with the same error.
I don't have windows 10 System Recovery Disk, but I have Windows 8.1 System Recovery in USB. However, the system is not booting from the USB. When I tried to change BIOS Boot order, the system asks a password, but I didn't give any password. I will be extremely grateful If anyone can fix this problem.
Thank you
Sankar

To fix the problem, you are probably going to have to boot from the USB. If there is a password set in the bios, to clear it you will have to reset the CMOS by removing the power supply, the main battery, and the little button battery on the motherboard which is likely located under the hard drive. With the power supply, main battery, and motherboard battery removed, hold the power key down for about 15 seconds to remove any residual power, re-install the batteries and power supply, and try to enter BIOS again to boot from USB.

It would also help to know exactly which model # Acer Aspire laptop it is.

Hello, you can create a Windows 10 disk from here:
Windows 10

Thank u very much your prompt reply. Acer Aspire E1 571 - Core i5 - 4GB RAM. Now I am downloading Windows 10 installation ISO file. Hope this will work without changing BIOS password.

Bios password info:
Acer Aspire Bios Password Removal Unlock: Acer Aspire E1-571 Bios & Hdd Password, Unlock Laptop