.
(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.
Atari 800XL Retro Computer Vintage Computing Gaming - Untested - No Power Supply
$119.99
Atari 1050 5.25" Floppy Disk Drive w/ CO17945 Power Adaptor - Powers On
$49.99
Atari 130xe Computer Case (no keyboard, no motheboard)
$40.00
Vintage Atari 1200XL Computer with video upgrade, works great.
$400.00
Vintage Atari 400 Computer System w/ Atari 410 Program Recorder
$100.00
Atari 400/800/XL/XE Computer SIO2PC - PC/Mac Disk Drive Emulator Adapter/Device
$15.25
Atari 1090XL Reproduction Main Board with two cards.
$249.42
Atari 1200XL Computer with Power Supply and BASIC - Tested 100% Working
$325.00
A8picoCart Atari 130 / 65 XE 800 / 1200 XL XEGS multicart UnoCart clone game
$32.95
Atari 600XL Computer Bundle TESTED WORKING With Cassette Recorder Atariwriter
$161.95