To increase the time allowed, from the BIOS setup screen, select the Boot tab, then change the Setup Prompt Timeout number.
In a Dell computer you can override the boot order and choose a boot device with F12. Set HP laptop to boot from USB flash drive. To enter into BIOS reboot your laptop and as soon as Dell Logo appears to start pressing the F2 key when it prompts. Since the computers came pre-loaded with Windows 8, they take full advantage of UEFI and its Secure Boot instead of a traditional BIOS. This same concept can be applied to any make/model that allows you to edit the boot order. Before updating BIOS, you can check the Dell BIOS version from System Information in Windows by searching the Start Menu. If the Secure Boot option is in the ‘Off’ state, you will need to enable it from your UEFI firmware settings. The issue: Dell laptop stuck in boot loop. This boot device menu is accessed once you’ve already entered into the BIOS or UEFI setup screen. However, the Dell boot menu key, as well as the BIOS key for some older Dell computers, maybe “Ctrl+Alt+Enter”, “Del”, “Fn+Esc”, “Fn+F1”. Leave the USB plugged into your computer for later BIOS update operation. 
The bios is A04, the admin password is lost and I need to boot to CD to reset the password with my USB cd rom and it won't boot to it.You will then be able to get into your Venue 11 or 8’s uEFI BIOS.
The maximum prompt timeout is 10 seconds Computer and motherboard manufacturers and BIOS suppliers may use varying keyboard keys or key combinations that can be pressed during system post to access your system BIOS.
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