There is nothing worse than a blank screen after pushing the power button on your computer. The heart stops, the shoulders sink and this feeling of utter despair and anxiety quickly overtake the body.
Why? Why is this happening right now! I have emails to check, orders to process, papers to submit.
It is inevitable a computer problem starts whenever you most need the computer.
A quick examination of the computer shows a flash drive sticking out of a USB port. Could this be the problem? Let me pull the USB out and restart my computer.
A few moments later you discover removing the flash drive did the trick, the computer boots up and starts, as expected. So what happened? Why will my computer not boot with a USB device plugged in?
In this scenario the explanation is very simple. When the USB is connected the operating system thinks it should boot from the flash drive, not the computer hard drive.
At one time in this USB’s life, the drive was made to be bootable and book-strap code was flashed to the device. Because the computer BIOS sees the drive and the boot code, the BIOS will instruct the computer hardware to reference the USB stick for the operating system.
This doesn’t mean any flash drive connected will force your computer to boot from a USB stick, only if the USB stick was made bootable at some point. Most flash drives are not bootable by default and have the boot-strap code to overtake the machine.
The other important point to consider,