This is most likely caused by your computer not being set to boot from a USB device.  Accessing the BIOS settings on computers varies depending on the make and model of the computer.  However, in general, when you first turn on your computer, you should see an option to enter your computer's setup.  To change your computer to boot to your Xtra-PC USB device, follow these steps:

  1. Shut down your computer, then restart it.
  2. When you see the manufacturer’s logo, hit the key displayed to enter the BIOS.  It varies, but this is sometimes called “Setup,” not BIOS.  (If your existing operating system starts, you’ve missed the chance to get into the BIOS.  If this happens, just start over and try again to hit the key in time--don’t worry; this may take you a few tries.)  This key varies by manufacturer.  The most common keys are F2, F10, F12, and Delete.  Here’s an example of what your screen may look like:

  3. Once you’re in the BIOS menu, select the “Boot” or “Boot Order” submenu.  All manufacturers use slightly different BIOS layouts, so look for a variation on the name Boot.
  4. In the “Boot” or “Boot Order” menu, change the Boot Order so that the “USB device” is the first Boot device.  Each BIOS menu will have a different way of displaying your drive.
  5. Save settings and exit.  Your computer should now boot from the Xtra-PC USB device