To boot from a disc in a USB external optical drive, first enable the Legacy USB Support feature -- in the Toshiba HWSetup utility, or in BIOS Setup.

HWSetup

Follow these steps to enable Legacy USB Support in the Toshiba HWSetup utility:

1. Click the Windows Start button, then Control Panel, Printers and Other Hardware, and finally Toshiba HWSetup.

2. In the HWSetup utility, click the USB tab -- as shown in the screen shot below.

3. Click Enabled in the Legacy USB Support section, then click the OK button.

4. Click the Yes button on the "Reboot the machine now?" message box, to restart Windows.

BIOS Setup

Follow these steps to enable Legacy USB Support in the BIOS Setup Utility:

         1. With the computer turned OFF, press the power button and then immediately press and hold the F2 key to start BIOS Setup.

         2. Tap the right arrow key to select the Advanced menu.

         3. Tap the down arrow key to highlight Legacy USB Support and press the spacebar to set the value to Enabled.

         4. Press the F10 key to Save and Exit, select yes to Save Configuration Changes and Exit Now. The computer will restart.

It should now be possible to boot from a compatible USB external optical drive by holding down the F12 key immediately after the computer is turned on, and then selecting external optical drive in the boot menu.

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