.
(specifically, HP's Pavilion P6-2310)
Excerpted from http://distrowatch.com/weekly.php?issue=20121126#news
Boot machine while pressing F10
Find Secure Boot in the menu tree, ignore warnings
Disable Secure Boot feature
Enable legacy boot options
Enable specific legacy devices, such as USB devices
Save and reboot while holding down F9
If this doesn't work for your device, refer to Jesse Smith's article for clues.
Also, post your solution if some other scheme works for you.
Cisco SG95-16 16-Port Gigabit Switch SG95-16-KR
$47.00
Cisco WS-C3750-48PS-S 48-Port Managed Gigabit Switch
$45.00
HP ProCurve 4108gl J4865A Modular Network Switch
$30.00
Cisco Catalyst 3850 48 PoE+ 48-Port Gigabit Managed Switch WS-C3850-48F-E
$219.99
New Linksys SE3005 5-port Gigabit Ethernet Switch
$15.99
Linksys SE3008 8 Ports Rack Mountable Gigabit Ethernet Switch
$18.99
NETGEAR 5-Port Gigabit Ethernet Unmanaged Switch (GS305) - NEW IN BOX
$18.99
Cisco WS-C3750X-48T-S 48 Port 3750X Gigabit Switch - Same Day Shipping
$49.99
*NETGEAR PROSAFE (JGS524V2) 24-Port Gigabit Ethernet Switch *NO AC*
$29.99
ARUBA J9772A 2530-48G PoE+ 48 PORT ETHERNET SWITCH W/ RACK EARS J9772-60301
$143.32