Dell Inspiron 14R (N4010, Early 2010) - Manual (Page 310)

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System Setup
Performing a One-Time Boot
You can set a one-time-only boot sequence without entering the system setup
program.
1 Shut down the computer through the Start menu.
2 Turn on the computer. When the DELL logo appears, press
immediately.
If you wait too long and the Windows logo appears, continue to wait until
you see the Windows desktop, then shut down your computer and try
again.
3 When the boot device list appears, highlight the device from which you
want to boot and press .
The computer boots to the selected device.
The next time you reboot the computer, the previous boot order is restored.
Changing Boot Sequence to a USB Device
1 Connect the USB device to a USB connector.
2 Turn on (or restart) your computer.
3 When
F2 = Setup, F12 = Boot Menu appears in the upper-right
corner of the screen, press .
If you wait too long and the operating system logo appears, continue to
wait until you see the Windows desktop, then shut down your computer
and try again.
4 The Boot Menu appears, listing all available boot devices.
5 Use the arrow keys to select the appropriate device (for the current boot
only).
NOTE:
To boot to a USB device, the device must be bootable. To ensure that a
device is bootable, check the device documentation.
Changing the BIOS Settings
The BIOS is a utility that serves as an interface between the computer
hardware and the operating system. The BIOS settings may need to be
updated for certain hardware replacements.