UEFI bios/firmware
Hi gang. Can anyone send me links or info. On how to disable high security UEFI in windows 8 & 8.1 computers. Cheers Abby
On Fri, Aug 07, 2015 at 02:28:06PM -0400, maxcess wrote:
Hi gang. Can anyone send me links or info. On how to disable high security UEFI in windows 8 & 8.1 computers. Cheers Abby
Hi Abby, Googling UEFI BIOS disable should bring up quite a few links. Unfortunately, there is no standardized way of disabling the UEFI and switching back to using BIOS. In general, there are basically two challenges: 1) getting the attention of the firmware that runs on initial startup before the operating system (Windows or Linux) gets to start, and 2) navigating the setup menus to disable the UEFI. Doing the first usually requires you to press or hold down a particular key at a particular time, which one and when depends upon the manufacturer. Depending upon a number of factors, you may or may not see a splash screen providing a hint while booting. Knowing the make and model of your computer can also help to determine this. Most computer manufacturers should have user documentation in PDF format that you can download from their web site. I hope that this helps.
On 15-08-07 03:41 PM, Steve Harvey wrote:
1) getting the attention of the firmware that runs on initial startup before the operating system (Windows or Linux) gets to start, and
2) navigating the setup menus to disable the UEFI.
Once you find the UEFI settings in the BIOS you may find that access to it is disabled. You will most likely need to set a supervisor password for the BIOS before it will let you have access to the UEFI settings. Just remember to remove the supervisor password when you are done (if you don't want/need it). -- Cheers! Kevin. http://www.ve3syb.ca/ |"Nerds make the shiny things that distract Owner of Elecraft K2 #2172 | the mouth-breathers, and that's why we're | powerful!" #include <disclaimer/favourite> | --Chris Hardwick
On Fri, Aug 07, 2015 at 03:41:48PM -0400, Steve Harvey wrote:
Hi Abby,
Googling UEFI BIOS disable should bring up quite a few links. Unfortunately, there is no standardized way of disabling the UEFI and switching back to using BIOS. In general, there are basically two challenges:
That is NOT what you want to do. You want to disable 'secureboot' not disable 'UEFI'. Not the same thing. Nothing wrong with UEFI at all, just secureboot.
1) getting the attention of the firmware that runs on initial startup before the operating system (Windows or Linux) gets to start, and
2) navigating the setup menus to disable the UEFI.
Doing the first usually requires you to press or hold down a particular key at a particular time, which one and when depends upon the manufacturer. Depending upon a number of factors, you may or may not see a splash screen providing a hint while booting. Knowing the make and model of your computer can also help to determine this. Most computer manufacturers should have user documentation in PDF format that you can download from their web site.
What you want is to enter the setup and find the setting that turns off secureboot, and that is it. Booting in UEFI mode is perfectly fine and most linux distributions have no issue with UEFI (and grub2 works fine with it too). UEFI also means you get to use GPT for your partition setup, which is much nicer than the old primary/extended/logical partition crap we used to deal with. If you really want, you can look for CSM (Compatibility Support Module) boot mode and use that, which should boot with BIOS compatibility services allowing you to install older OSs that require a BIOS. -- Len Sorensen
2015-08-07 15:28 GMT-03:00 maxcess <abidar.maxcess@gmail.com>:
Hi gang. Can anyone send me links or info. On how to disable high security UEFI in windows 8 & 8.1 computers. Cheers Abby
You could also check technet: https://technet.microsoft.com/en-us/library/dn481258.aspx ;]
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On Tue, Aug 11, 2015 at 12:39:02AM +0200, Abby Bassie-Cripps wrote:
<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div> <div>Hello Len</div>
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<div>That was very informative, thank you.</div>
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<div>For an update, the main computer is question is a toshiba satellite with win 8.1. In this once case, I could not find any default to unlock the secure boot.</div>
<div>In addition, all of the computers that have come my way with UEFI, are windows 8 & 8.1 and are all secure in some form or another. I know have three computers that where given to me because of the UEFI / secure boot issue. I have never come across a computer that used UEFI and was not secure booted. All other computers I have worked on, have been using bios.</div>
<div>Seperately, I have what was a $1400 laptop that came with win. 7. It had UEFI, but was the only computer not using secure boot. I have since put 8.1 and now 10 on it and it works better than 7, using UEFI. Its secure boot was apart of the UEFI. Hense my mis-understanding.</div>
<div> <div>For the group, I perfer Ubuntu and now my iMac with OS X 10.10.4. There is so little issues with both, compared to windows OS.</div>
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<div>So Len, are you able to tell me what the steps should be to disable the secure boot in windows 8 & 8.1? Other than the simple out dated method that we all know about?</div>
Well from what I can find the process is: When you see Toshiba logo, hit F2, then you should be in the UEFI (BIOS) settings. Under security tab there should be an option for 'secure boot' which you want to set to disabled. If you want to keep windows working, that should be all you change, and then you should be able to install linux as long as the distribution is new enough to support UEFI booting. If you don't want to keep windows and you want to use an older style distribution that does not do UEFI booting, then you have to also find the "CSM boot" setting (under advanced/system settings) and turn that on. That will break booting windows 8.1 on the machine though. I would personally stick with UEFI booting these days. https://aps2.toshiba-tro.de/kb0/TSB2B03F30002R01.htm -- Len Sorensen
participants (6)
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Abby Bassie-Cripps -
Kevin Cozens -
Lennart Sorensen -
Marcelo Cavalcante -
maxcess -
Steve Harvey