1.    25 Sep 2017 #1
    Join Date : Dec 2015
    Posts : 105
    Windows 10

    How to access/fix a non booting Windows 10 on a laptop with UEFI bios?


    So basically back in the days a simple as F8 boots you to safe mode or F12 could bring up boot menu where you could boot from a flash drive or an optical disc , use a tool like hirens boot cd to undo the mess or just do a windows upgrade and you are good .

    Now what's the new trend as UEFI bioses just lock you out from both bios and boot menus unless you legitimately pick those from inside OS menus , a friend had his windows 10 falling into some boot loop and all i could think of was to unscrew the hard drive and work on it externally , is that the trend really or am i missing something ?
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  2.    25 Sep 2017 #2
    Join Date : Dec 2015
    Posts : 5,904
    Windows10

    Quote Originally Posted by nIGHTmAYOR View Post
    So basically back in the days a simple as F8 boots you to safe mode or F12 could bring up boot menu where you could boot from a flash drive or an optical disc , use a tool like hirens boot cd to undo the mess or just do a windows upgrade and you are good .

    Now what's the new trend as UEFI bioses just lock you out from both bios and boot menus unless you legitimately pick those from inside OS menus , a friend had his windows 10 falling into some boot loop and all i could think of was to unscrew the hard drive and work on it externally , is that the trend really or am i missing something ?
    It can be tricky getting to Bios if UEFI, particularly if fast boot is enabled.

    There are several tricks to force getting to bios

    1) See if bios has jumper settings you can change to make it boot to bios

    2) Remove CMOS battery which often forces a jump to bios to reset date/time

    3) Remove hard drive, and boot with a windows 10 installation flash drive or dvd inserted. As it will not detect hdd, it will boot from usb drive or dvd next, and using repair options, you can get to the bios via the repair menus. This is probably easiest to try first.

    Once you get to bios, you can set boot order to boot from usb drive or dvd first. Then replace hdd and boot from flash drive or dvd. I always set the boot order to boot from flash drive first on any new pc, so I do not get caught.
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  3.    25 Sep 2017 #3
    Join Date : Dec 2015
    Posts : 105
    Windows 10
    Thread Starter

    Quote Originally Posted by cereberus View Post
    It can be tricky getting to Bios if UEFI, particularly if fast boot is enabled.

    There are several tricks to force getting to bios

    1) See if bios has jumper settings you can change to make it boot to bios

    2) Remove CMOS battery which often forces a jump to bios to reset date/time

    3) Remove hard drive, and boot with a windows 10 installation flash drive or dvd inserted. As it will not detect hdd, it will boot from usb drive or dvd next, and using repair options, you can get to the bios via the repair menus. This is probably easiest to try first.

    Once you get to bios, you can set boot order to boot from usb drive or dvd first. Then replace hdd and boot from flash drive or dvd. I always set the boot order to boot from flash drive first on any new pc, so I do not get caught.
    Me and my friend use laptops , doesn't show any signs of jumpers or batteries anywhere on the open-able area at the back . So i think its all down to option 3

    So a laptop need to be set in advance to load from optical drive / usb flash , now there is this one other catch , i recall i did attempt once to use a hiren boot cd and it didn't even detect the hard drive on the laptop and searching the forums they said its a normal behavior with UEFI bioses as they aim to protect system data , are there settings or means to bypass these restrictions ? there was a project i remember of an attempt to create something similar to hirens XP but Windows 10 based and was said might be able to access UEFI protected hard drives but I cant find it anymore , so any thoughts about that ?
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  4.    25 Sep 2017 #4
    Join Date : Dec 2015
    Posts : 5,904
    Windows10

    Use the best tool ever from here (thanks to @Kyhi). Forget Hiren's that is so last decade.

    Windows 10 Recovery Tools - Bootable Rescue Disk - Windows 10 Forums
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