Usb boot priority

To boot from a CD, DVD or USB device, make sure that the device has boot sequence priority over the hard drive.

BIOS Boot

BIOS (Basic Input Output Subsystem) is a programmable chip that controls how information is passed to various devices in the computer system. A typical method to access the BIOS settings screen is to press ESC, F1, F2, F8 or F10 during the boot sequence.
BIOS settings allow you to run a boot sequence from a floppy drive, a hard drive, a CD-ROM drive or an external device. You may configure the order that your computer searches these physical devices for the boot sequence.
The first device in the order list has the first boot priority. For example, to boot from a CD-ROM drive instead of a hard drive, place the CD-ROM drive ahead of the hard drive in priority.
Before you set boot priority for a USB device, plug the device into a USB port.
To specify the boot sequence:

1. Start the computer and press ESC, F1, F2, F8 or F10 during the initial startup screen. Depending on the BIOS manufacturer, a menu may appear.
2. Choose to enter BIOS setup. The BIOS setup utility page appears.
3. Use the arrow keys to select the BOOT tab. System devices appear in order of priority.
4. To give a CD or DVD drive boot sequence priority over the hard drive, move it to the first position in the list.
5. To give a USB device boot sequence priority over the hard drive, do the following:
   • Move the hard drive device to the top of the boot sequence list.
   • Expand the hard drive device to display all hard drives.
   • Move the USB device to the top of the list of hard drives.
6. Save and exit the BIOS setup utility.
7. The computer will restart with the changed settings.

Boot Priority Options

Some computer manufacturers allow you to select the device that contains the boot sequence from a special device selection menu. The example below uses a Dell system board.
To set boot priority using a device selection menu:

1. When the computer starts to boot up, after the manufacturer's ID screen, press F12 several times. The device selection menu appears.
2. Use the up and down arrows to select CD-ROM or

Download the latest BIOS update from your computer manufacturer's website onto a USB flash drive. Refer to your user manual to obtain the manufacturer's website address.

If the downloaded BIOS file is a zip archive, unzip the contents onto your USB flash drive.

Jumper settings may need to be reconfigured on some motherboards to enter BIOS recovery mode. Most Intel-based motherboards have a jumper setting or switch near the on-board

CMOS battery.

The procedure for setting the jumpers will vary depending on your motherboard make and model, so refer to the motherboard documentation for specific instructions.

Power on the computer and press "F2" to access the Setup Mode menu.

If you are unable to access the setup menu, you will not be able to proceed with this repair. Take your computer to a repair shop, as the motherboard may need to be replaced.

Use the arrow key to select "Boot Priority" or a similarly named field. Press the "Enter" key.

Scroll down until "First boot priority" or "First boot drive" is selected and press "Enter."

Select the USB flash drive as the first boot priority device. Press the "F10" key to save this setting and exit from the setup menu.

Connect the USB flash drive to an open USB port on your computer.

Then let your computer fully reboot.

The USB flash drive should be detected and the BIOS should update automatically.

When the update is complete, you may be prompted to restart your computer, or it may reboot automatically.

If you are able to use your computer without any further problems of overheating or failure to recognize drives, your failed BIOS update has been resolved.

hope this helps

Hi there.

Remove all usb flash drives or external hard drives connected to the laptop.
If no flash drives or external hard drives are present the you will need to reboot your system and press the delete key repeatedly until you get into the BIOS. Once in the BIOS you will need to locate boot disk priority. Set priority 1 to the laptop's main drive and priority 2 to the CD/DVD drive.
Now it should first try boot on your hard drive with your operating system on it. If after this you still get the unmountable boot volume error then your hard drive may be corrupt.

~ Slasher_X

Booting from USB is a function of your motherboard. Load the BIOS and check the boot priority to see if USB is one of the options. Set it to first priority if your install is located on the USB drive.

Sounds like your Boot Priority is set to USB first. Go into BIOS and change the Boot Priority to CD/DVD, Hard Disks, then USB and you should be good. It is doing this because it is trying to boot from the USB drive instead of your hard drive. You unplug the external disk and so that takes USB out of the loop, then allowing it to move to the next option which is probably Hard Disks. So get into BIOS, Change Boot Priority, Reboot. You should be good from there!

Good luck!

When turning on your computer, there should be a screen display either in your brand logo that promts to press a key to enter setup,bios etc. or boot priority. If it takes you into the BOIS menu, go to the boot tab, and change your boot priority to usb as first boot priority. Save and exit, you should be good to go. Should boot from the usb dvd.

Hello,
When you have switched on your PC, strike F2 several times or DEL to enter to your Bios set up. As sson as you're in, set boot rpiority to USB Disk drive as your priority boot sector instead of Hard Disk drive.
If you don't have CDROM player/drive, you can use USB as priority boot but you may have another installer for reformatting via USB.
Blessings.

Have had loads of usb media, as far as I know some USB sticks are bootable others are not, usually it will say either on the manual or on the box of the product whether its bootable. If it is bootable format the usb drive fully then copy the BOOT.INI, NTLDR, and NTDETECT from the root directory of your PC's boot drive to the flash drive. These files are hidden by default, so you will either have to configure Windows Explorer to show hidden files (including protected operating system files) or you will have to open a Command Prompt window and use the COPY command to copy the files. If you choose to use the Windows Explorer method, then open Internet Explorer and enter C: into the address bar so that you are looking at your local hard drive. Next, select the Folder Options command from the Tools menu. When the Folder Options properties sheet opens, select the View tab. Now, just select the Show Hidden Files and Folders and deselect the Hide Extensions for Known File Types and the Hide Protected Operating System Files check boxes. Click OK to continue.

Now that you have formatted your USB flash drive and installed the boot files onto it, the next thing that you must do is to configure your PC to allow you to boot from the flash drive. This is all done through the computer's BIOS Setup. I can't give you specific instructions for this part, because every computer is different. I can give you a few pointers though.
You can access your computer's BIOS by pressing a specific key immediately after you turn the PC on. The key varies, but it is usually either [F1], [F2], or [Delete]. Once you are in the BIOS Setup, you should verify that all of your computer's USB options are enabled. This might include things like support for legacy USB devices or support for USB 2.0. If there is a time out setting for USB devices, you should set it to the max to insure that the system doesn't time out while waiting on the USB device to boot.
Next, find the section on boot device priority. Normally, a USB flash drive (which is usually listed as USB-HDD, but may be listed as a removable device) will have a very low boot priority. If the USB flash drive's boot priority is lower than the hard disk (listed as HDD) then the only time the computer would ever boot off of the USB flash drive is if the system were to fail to boot from the hard disk. You must therefore rearrange the boot device priority so that the flash drive has a higher priority than the hard drive.

just may the CDROM the top priority, then it may ask you to restart the computer, just let it restart then put the CD in.

please check the boot priority in cmos setting...if its 1 priority given from usb drive than it will not boot till u unplug it.