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  1.    11 Apr 2016 #1
    Join Date : Feb 2016
    Posts : 111
    Windows 10 Pro

    Windows 10 Automatic Repair - switching between UEFI and non UEFI devi


    Hello. So i got automatic repair after changing boot order from UEFI USB KINGSTON to P1 Samsung SSD 840 EVO. I am able to get through to Windows 10 but after restart after automatic repair. So i am needing 2 boots now.

    Screen:
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    And my question is this related to my switch between UEFI and NON UEFI device or that doesnt matter?

    My motherboard is Asus Sabertooth Z97 Mark 2.

    System was working fine few days on P1:Samsung SSD ( MBR ). Problem appear when someday i just change again ( maybe my 5 switch ? ) boot order from UEFI USB KINGSTON to P1:Samsung SSD ( MBR ). So is this related to this or that doesnt matter?
      My ComputerSystem Spec
  2.    11 Apr 2016 #2
    Join Date : Oct 2013
    Tropic of Cancer
    Posts : 1,648
    Microsoft Windows 10 Home

    First of all, you dont need to change the boot priority in order to boot from the USB. Use the "Boot Menu" key for this purpose.

    In a UEFI system, the disk should boot as a UEFI disk.
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    If you load the defaults in the BIOS, does it boot back to the SSD? Let us know.
      My ComputerSystem Spec
  3.    12 Apr 2016 #3
    Join Date : Feb 2016
    Posts : 111
    Windows 10 Pro
    Thread Starter

    System is installed and formatted on MBR partition. So i guess its on LEGACY MODE. So i dont have boot manager SSD Samsung 250 EVO in UEFI. Only have P1: SSD Samsung Evo 250 GB like on screen.
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    Problem started after memtest86 session bootable from USB .After finished memtest86 test i change in my UEFI boot priority from :"UEFI USB KINGSTON" to "P1 SSD SAMSUNG EVO 250 GB ( MBR partition )". .And then everytime i restarting Windows 10 by button RESTART from START in next boot i have Automatic Repair. On next boot i am able to boot fine to Windows 10. It's a bit weird that it reboots twice and then get's through..

    Maybe something with UEFI and boot of my SSD which is MBR? Or that doesnt matter?

    But from what i know UEFI can also boot from a MBR disk.

    And it happened just after my finished memtest86 session. So its only coincidence that happened after memtest86 session or not? Thx


      My ComputerSystem Spec
  4.    12 Apr 2016 #4
    Join Date : Oct 2013
    Tropic of Cancer
    Posts : 1,648
    Microsoft Windows 10 Home

    Quote Originally Posted by xxx123 View Post
    System is installed and formatted on MBR partition. So i guess its on LEGACY MODE.
    We need to be sure about it, and this info will be important to fix the issue. Please post a screenshot of your disk management window.

    Memtest86+ itself it not the source of the issue, but something related to the BIOS settings is causing it. The aforesaid screenshot tell tell us more about it.
      My ComputerSystem Spec
  5.    12 Apr 2016 #5
    Join Date : Feb 2016
    Posts : 111
    Windows 10 Pro
    Thread Starter

    So i am after format this time with GPT partition and no problems . But i want only know what caused that Automatic Repair before format. Software , bios uefi or hardware? ( that happened after memtest86 session ).
      My ComputerSystem Spec
  6.    12 Apr 2016 #6
    Join Date : Oct 2013
    Tropic of Cancer
    Posts : 1,648
    Microsoft Windows 10 Home

    Quote Originally Posted by xxx123 View Post
    So i am after format this time with GPT partition and no problems . But i want only know what caused that Automatic Repair before format. Software , bios uefi or hardware? ( that happened after memtest86 session ).
    As far as I can say, it was something related to either the BIOS settings or any possible boot corruption. The disk management window will tell us a bit more.

    If you find that the issue is over, please mark the thread as solved.

    UEFI+GPT is the most desirable combination for windows 10.
      My ComputerSystem Spec
  7.    12 Apr 2016 #7
    Join Date : Feb 2016
    Posts : 111
    Windows 10 Pro
    Thread Starter

    So i ask somebody about reason of Automatic Repair.
    And he said :"You need UEFI to boot from a GPT drive. But UEFI can also boot from a MBR disk. So this in itself shouldn't make Windows think that it needs to repair itself."


    So propably switching from UEFI device ( UEFI USB KINGSTON ) to non UEFI device ( P1:Samsung Evo 250 GB ) was not issue ?
      My ComputerSystem Spec
  8.    12 Apr 2016 #8
    Join Date : Oct 2013
    Tropic of Cancer
    Posts : 1,648
    Microsoft Windows 10 Home

    It depends on the BIOS mode.

    If it is Legacy, there would not have been a real need to run a USB as UEFI. The CSM settings in the BIOS boot settings should take care of it automatically. And if it is UEFI, then if you want to boot from a disk in non-UEFI mode, it should refuse to boot.

    That is why it is a bit problematic to arrive at a concrete decision. The most important information is missing here, the BIOS mode.

    But, when you converted the disk to GPT, then the BIOS must be UEFI, and the problem should not occur anymore.
      My ComputerSystem Spec
  9.    12 Apr 2016 #9
    Join Date : Feb 2016
    Posts : 111
    Windows 10 Pro
    Thread Starter

    Ah and last thing. During that period with Automatic repair i get second issue too. And i dont know if it was related to Automatic Repair or not.

    Task manager and event viewer was not responding and some of the applications stop responding. I was clicking and nothing happening. Next. Next when i was clicking 3dmark 11 TEST i was getting weird system slowdown. Almost all programs stop working. Start menu was not responding. All applications wont responding and became very laggish. Gets stuck on "Logging Off" when attempt to shutdown or restart. System become unresponsible and laggish. I cant do almost everything. I cant restart system because START button stop working.
    Opening some file taking 10 second. I must force hard reset to work properly again system. Almost everytime
    when i click run test in 3dmark 11 causing this issue.


    So that was related to that Automatic Repair or not?
      My ComputerSystem Spec
  10.    12 Apr 2016 #10
    Join Date : Oct 2013
    Tropic of Cancer
    Posts : 1,648
    Microsoft Windows 10 Home

    3DMark purposefully puts a very high stress on the GPU and the CPU as well. So it is not unexpected that it will make the system laggish and slow during the test. The important question here: does it crash the system during the test? If not, dont worry.
    If it crashes, first concentrate on your overclocking settings, lower the clocks down; and then test the individual hardware components.

    No, it is not related to Automatic Repair, it is related to benchmarking using 3DMark.
      My ComputerSystem Spec

 
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