Windows 10: General UEFI Question

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  1.    13 Aug 2015 #11

    Surely even with fast boot on you can still access the bios from a cold start (not a restart) by pressing F12 or DEL or whatever your mobo requires? I can anyway.
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  2. Posts : 377
    Windows 10 Pro 64bit v10586.3
       13 Aug 2015 #12

    Shut down pc/laptop. press and hold down f2. Restart pc/laptop while still holding f2 down, release when you see bios. enjoy.

    note: IMPORTANT. DON'T BE REFLASHING THE BIOS FOR THIS. warned.
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  3.    13 Aug 2015 #13

    If it's a laptop, power down, remove the battery, unplug the power pack, press and hold the power button for say 10 seconds. Then plug everything back in and power up, pressing your BIOS access key. If it's a desktop PC it's the same only no battery to remove. This should kill what ever hibernation state your in and give you an actual cold boot.
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  4.    13 Aug 2015 #14

    brianwall said: View Post
    Surely even with fast boot on you can still access the bios from a cold start (not a restart) by pressing F12 or DEL or whatever your mobo requires? I can anyway.
    I've been having trouble with restart as well from inside the Windows environment. Weirdly enough, when I do a cold start F12 does nothing - no option to do so even presents itself. However, if I restart from the Windows login screen it does actually restart and I can F12 from there.
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  5.    13 Aug 2015 #15

    brianwall said: View Post
    You do this in the BIOS so don't need windows loaded.
    If "rezpower" referred to the settings in the Power control panel, it's definitely in Windows.
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  6.    13 Aug 2015 #16

    brianwall said: View Post
    You do this in the BIOS so don't need windows loaded.
    Don't confuse the BIOS Fast Boot option with Windows Fast Startup option. Two totally different things, you can't turn off Windows Fast Startup from the BIOS. One issue with it is, it puts the PC in a hybrid sleep mode instead of a complete shutdown. Coming out of this mode bypasses the option to enter the BIOS. For a lot of PC's it does anyway. It's been an issue for me so I turn it off. I have an SSD so its not going to speed thing up to where it would be noticeable anyway. What rezpower posted is how you turn it off in Windows. It won't work though if you can't actually boot into windows.
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  7.    13 Aug 2015 #17

    lopedoggie said: View Post
    Shut down pc/laptop. press and hold down f2. Restart pc/laptop while still holding f2 down, release when you see bios. enjoy.

    note: IMPORTANT. DON'T BE REFLASHING THE BIOS FOR THIS. warned.
    That's not universal across all laptops though. F2 won't do anything on boot on my laptop.
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  8. Posts : 8,168
    Windows 10 Enterprise and Pro/Windows 7 Enterprise/Linux Mint
       13 Aug 2015 #18

    alphanumeric said: View Post
    Don't confuse the BIOS Fast Boot option with Windows Fast Startup option. Two totally different things, you can't turn off Windows Fast Startup from the BIOS. One issue with it is, it puts the PC in a hybrid sleep mode instead of a complete shutdown. Coming out of this mode bypasses the option to enter the BIOS. For a lot of PC's it does anyway. It's been an issue for me so I turn it off. I have an SSD so its not going to speed thing up to where it would be noticeable anyway. What rezpower posted is how you turn it off in Windows. It won't work though if you can't actually boot into windows.

    It can also cause problems when you have a separate OS installed on another disk. The Hybrid Sleep option does not dismount the disks. It wanted to run check disk on every hard drive I had with it on. I turned it off in the OS, and now I have no problem.
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  9.    13 Aug 2015 #19

    I placed two .bat files on my desktop. One to completely shutdown the pc, on to take advantage of the hybrid shutdown. Now if I want to boot into my Linux OS I use the .bat for complete shutdown, otherwise I chose the hybrid shutdown one.
    Last edited by altae; 14 Aug 2015 at 07:26.
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