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Changing boot order with secure boot enabled


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#1 71619997a

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Posted 27 October 2015 - 12:41 PM

Basically, I have a really bleepty BIOS that will only let me change the boot order with secure boot disabled and legacy boot enabled. I need secure boot because I just installed windows 10 onto a new drive and it won't activate. I have heard that this has something to do with secure boot being disabled. I still have the activated drive, which is the primary drive. Is there anything I can do to change the boot order?

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#2 RolandJS

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Posted 27 October 2015 - 01:14 PM

What happened when you tried the F12 [if it works, u-choose which device to boot]?

Ooops, I think SecureBoot only allows DVD or internal HD [w/OS] to boot.


Edited by RolandJS, 27 October 2015 - 01:15 PM.

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#3 britechguy

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Posted 27 October 2015 - 01:46 PM

Isn't it possible to go into BIOS and set up a single boot "as you'd like it" with secure boot off then go in once that boot has succeeded, arrange things as you'd like as far as which hard drive to boot from, and turn secure boot back on?

 

I could swear I've seen this discussed, but I can't for the life of me remember where.

 

I did put a post in the Win10 Tips & Hints thread about how to get into BIOS at boot time to make these tweaks if your machine is post-UEFI.  When I did get into BIOS myself it appeared I could turn secure boot off, rearrange my boot device order, and turn secure boot back on but I didn't try that because I had no need to do so.


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#4 JohnC_21

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Posted 27 October 2015 - 02:12 PM

If the computer is UEFI then you need to add the boot option if you do not see your DVD listed. Secure Boot needs to be off.

 

DSCN0802.jpg

 

 

 

 

 

Most modern computers also give you a boot menu by tapping a key at boot which lets you select the boot device.



#5 britechguy

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Posted 27 October 2015 - 02:21 PM

 

 

 

 

Most modern computers also give you a boot menu by tapping a key at boot which lets you select the boot device.

 

John, is that true on UEFI computers with Secure Boot enabled?   If it is I'd love to know what that key is for my HP laptop.

 

I'm accustomed to having function key access to both BIOS and the Boot Options but have not had any success in finding it/activating it on this laptop.  It's not like I use it very often but it was so much easier to do a BIOS tweak or a Boot Order tweak on those rare occasions it was needed pre-UEFI/Win8.


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#6 JohnC_21

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Posted 27 October 2015 - 03:04 PM

Sorry, I was not clear enough. You can't boot any device with Secure Boot enabled other than the OS HDD or a DVD/USB flash drive install of Windows 8 and later if I can remember. If you tap Esc at boot does it allow you to boot a device from legacy mode? I have a HP desktop that has UEFI and tapping Esc gives some menu options including Legacy mode but I don't have SecureBoot in the UEFI.

 

Edit: I am still trying to wrap my head around UEFI. I know that you cannot boot a disk on a UEFI computer unless it is GPT. The best page I found on it is here.


Edited by JohnC_21, 27 October 2015 - 03:15 PM.


#7 britechguy

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Posted 27 October 2015 - 04:44 PM

John,

 

        Thanks for mentioning the "tapping Esc during startup" technique.  On my HP laptop this does indeed cause a variant of a startup menu to appear.  Details (including some very brief overview on UEFI) for HP machines is shown on this support webpage.  My startup menu is white text on a black background but in all other respects it's identical to the blue background/white text screen capture that's shown there.

 

        This method is so much easier than doing the iterative restarts of Win10 that I mentioned on the Hints thread.


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#8 usasma

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Posted 28 October 2015 - 09:37 AM

What's the make and model of the system (or the motherboard if it's a custom build)?

 

On a Secure Boot enabled system, if you don't have UEFI boot devices, in general they won't show up in the boot menu - even if you select the boot menu key

For example, if you have a bootable DVD that's not UEFI capable - then it won't show up

If you have a bootable DVD that is UEFI capable - then it will show up.

 

To further confuse things, there may be some settings in the UEFI for letting devices show (such as USB devices (CD/DVD and/or flash/external drives), network drives, and regular CD/DVD drives)

 

As for needing Secure Boot to activate - that's not true.  Otherwise you wouldn't be able to activate W10 on W7 systems that have been updated - and I've done that many times.


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