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Option
Boot Sequence Retry
Generic USB Boot
Hard-disk Drive
Placeholder
Clean all Sysprep
and SysPrepOrder
variables
UEFI Boot Settings
Choose system boot mode
System Setup enables you to specify the boot mode for installing your operating system. UEFI boot mode (the default) is an
enhanced 64-bit boot interface. When you have configured your system to boot to UEFI mode, it replaces the system BIOS.
1. From the System Setup Main Menu, click Boot Settings, and select Boot Mode.
2. Select the UEFI boot mode that you want the system to boot into.
CAUTION:
If the operating system is not installed in the same boot mode, switching the boot mode may
prevent the system from booting.
3. After the system boots in the specified boot mode, install your operating system from that mode.
NOTE:
Operating systems must be UEFI-compatible to be installed from the UEFI boot mode. DOS and 32-bit operating
systems do not support UEFI and can only be installed from the BIOS boot mode.
For the latest information about supported operating systems, go to www.dell.com/ossupport.
Change the boot order
To boot from a USB drive or an optical drive, you must change the boot order.
If you already have the BIOS set for Boot Mode, the following instructions may vary. Changing the drive boot sequence is only
supported in BIOS boot mode.
1. On the System Setup Main Menu screen, click System BIOS, Boot Settings, UEFI Boot, and then UEFI Boot
Sequence.
2. Use the arrow keys to select a boot device, and then use the plus + and minus - keys to move the device up or down in the
order.
3. Click Exit, and then click Yes to save the settings.
You can also enable or disable the boot order devices as needed.
Network settings
In the BIOS, access Network Settings to view details. Network Settings are not supported in BIOS boot mode.
1. To view the Network Settings screen, power on the system and press F2.
2. Click System Setup Main Menu, System BIOS, and then Network Settings.
38
Pre-operating system management applications
Description
CAUTION:
Switching the boot mode may prevent the system from booting when
the operating system is not installed in the same boot mode.
NOTE:
Setting this field to UEFI disables the BIOS Boot Settings menu.
Enables or disables the Boot sequence retry feature, or resets the system. When this option is
set to Enabled and the system fails to boot, the system repeats the boot sequence after 30
seconds. When this option is set to Reset and the system fails to boot, the system reboots
immediately. This option is set to Enabled by default.
Enables or disables the generic USB boot placeholder. This option is set to Disabled by default.
Enables or disables the Hard-disk drive placeholder. This option is set to Disabled by default.
When this option is set to None, the BIOS does nothing. When set to Yes, the BIOS deletes the
SysPrep #### and SysPrepOrder variables. Once removal of the variables is complete, the
options reset to None. This setting is only available in UEFI Boot Mode and is set to None by
default.
Specifies the UEFI boot sequence. Enables or disables UEFI Boot options.
NOTE:
This option controls the UEFI boot order. The first option in the list is attempted
first.
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