Your HP desktop computer goes through a routine called the Basic Input/Output System (BIOS) each time you power the system on. The BIOS boots up your HP computer and checks each of the attached hardware devices to make sure they are functioning correctly. If you ever need to change any of the various BIOS boot options, you will need to access the primary BIOS menu and then navigate to the boot sub-menu.
Restart the HP desktop computer. Wait for the HP logo to appear on the screen.
Repeatedly tap the "F1" key until a new menu screen appears if your HP computer uses Windows XP or an earlier operating system. Tap the "F10" key instead if the HP computer uses the Windows Vista operating system.
Press the right arrow key twice to navigate to the BIOS "boot" menu screen.
Press the "F5" key if you want to restore the BIOS boot options to their original factory settings. Use the up and down arrow keys to access any specific menu options you need in the boot menu.
Press the "F10" key to save any changes you made and return to the HP computer's operating system.
You can choose the "Boot Device Priority" option to change the types of devices that the HP computer will boot from, such as a boot-able CD or USB flash drive.
Do not make any changes to the boot options unless you know specifically what options need to be modified. If you change the wrong option, your HP computer may no longer boot up properly.