Change boot order in Win10 HP15 Notebook

[AntonioBI]

I try to change order boot in BIOS (DVD - OS Manager - Others)

At the end, after pressed F10 (Save), a message prompt me:

"Operating System Boot Mode Change.

A change to the operating system secure boot is pending.

Please enter the pass code displayed below to complete the change.

Operating system boot mode change (021)

.... + ENTER to complete the change.

ESC to continue without changing"

Also clicking the number ...., they are not shown on screen,

and pressing ENTER, there is not change to boot order.

If I shutdown the copmputer and enter in Bios, the order is changed (DVD/HDD)

in the sections "Uefi boot order" and "Legacy boot order",

but the ">" indicators are positioned on items "OS Manager" and "Notebook HD",

not on items "Internal CD/DVD" and "Internal CD/DVD"

Perhaps, keyborad is not loaded in this step?

Thanks for answer.

Antonio BIANCA

[Guleria_123]

As we have properly understood your issue  please follow these steps:

1. Turn on or restart the computer.
2. While the display is blank, press the f10 key to enter the BIOS settings menu.
3. Press the f9 key to reset the BIOS to the default settings.
4. Press the f10 key to save the changes and exit the BIOS settings menu.

Nitin singh guleria

[AntonioBI]

Perhaps, I expressed mysel badly!

I want to change the order of boot (default: SO Manager/DVD/USB) to "DVD/So Manager/USB",

because I need to install Win7 in a disk's partition of my computer (Win10).

If I reset with F9 (and F10 to save), how system allows me to start from a DVD installer?

The problem is that System Machine (Sefi?) prevents me to change the boot order.

At the end of the procedure (changing Bios Order Boot), the System ask me to insert

a code (4 numeric digits) to accept the change, but pressing the characters on the keyboard

(the numeric-pad at right and the keyboard at center) they don't appear on the screen

and pressing ENTER the procedure continue logging Win10.

If I restart, I see that the order has been changed, but the DVD is equally ignored

and the System logs to Win10 directly.

Then, no change, or no accept code has been inserted.

My english is... is... poorly understood!!! *_*

Best regards

Antonio BIANCA