With a usb connected enter your system BIOS by pressing the Delete key during boot up through one of the menus select primary boot as usb. Where the selection is located in the menu will vary depending on your system.
USB boot allows you to boot your system from virtually any USB device. You basically can but from floppy, CD/DVD, and stick as far as they have USB interface.
If you have a USB drive and your BIOS supports booting from a USB device then try that.
You cannot move the BIOS into a USB device. I think you meant the boot order/setup. To do so, enter your BIOS settings page when you switch on your computer (you have to press ESC or F8 or some other key depending on your motherboard). Then search for some option labelled something like Boot setup or boot order. There change the preference from your current boot disc (where your OS is) to the desired USB device. Note that your USB device should have a boot loader to correctly boot the OS stored on it.
A recent Mac with an Intel processor can boot from a USB 2.0 Hard drive. Earlier Macs could only boot from a Firewire Hard drive. When you turn on the Mac hold down the Option (alt) key. This will cause the Mac to scan for all available bootable drives. Select the one you want to boot from and it will start up from that drive.
This was a BIOS settings issue. In the BIOS of this Asus netbook I found a second setting, which also had to be set with "USB" as 1st boot device. When I found this setting, the 'Boot Settings' dialog box had the following categories: "Boot Device Priority". "Hard Disk Drives": It was necessary to additionally set "USB" as 1st boot device within the "Hard Disk Drives" category. In here its default settings were: "HDD" "USB".
no :(
You could boot it, but it would never get beyond the initial stages. The setup program looks for the CD after it starts so it can read the rest of the files. Since it does not know how to read a USB Flash drive, it will not find the files it is looking for and will fail.
There are various places where one can learn how to make a USB boot device. For example, Tech Republic, Tweek and Trick, Rufus, PoweISO and Make Use Of.
Most likely the computer is trying to find a boot device on the USB port. Check the BIOS settings to make sure the computer isn't looking at the USB for boot data.
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Only if you can boot from it. Most new computers can boot from a USB drive, but older ones may not be able to.
On normal start up, IE pressing the power on button, then tap the F2 button when indicated at the bottom left of the start up screen. This opens up the BIOS screen. Move across to "Boot Options". Go down until "boot from USB is selected. Using the allocated buttons, move the selected "boot from USB" to the top of the list. press F10 to save and exit. the computer then continues start up sequence, if there is a USB stick in the port, and it has an ex/OS on it, it will run the program. I run Android 3 in this manner.