Convert dual boot disk into single OS

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  1.    #21

    zbook said: View Post
    Please explain one versus the other for EFI.
    create partition msr | Microsoft Docs
    UEFI/GPT-based hard drive partitions | Microsoft Docs
    Type | Microsoft Docs


    Currently one computer with UEFI displayed the above message.
    "This PC can't run Windows 10
    We couldn't update the system reserved partition"
    This is not MSR related. That error message is misleading - I have seen it in relation to issues with updating EFI partition but MS have not properly updated error messages from legacy bios days (crap programming).
      My ComputerSystem Spec

  2. Kari's Avatar
    Posts : 15,803
    Windows 10 Pro
       #22

    cereberus said: View Post
    The MSR is a partition reserved for future use and to date has no functionality and if deleted, there is no impact at all.

    Of course, one day MS might use it but it is easy to recreate using diskpart.
    Martin, Microsoft seems to think differently:

    A Microsoft Reserved partition is required on every gpt disk. The size of this partition depends on the total size of the gpt disk. The size of the gpt disk must be at least 32 MB to create a Microsoft Reserved partition.
    This from page already linked here a couple of times: create partition msr | Microsoft Docs

    Kari
      My ComputerSystem Spec


  3. Posts : 25,055
    windows 10 professional version 1607 build 14393.969 64 bit
       #23

    cereberus said: View Post
    This is not MSR related. That error message is misleading - I have seen it in relation to issues with updating EFI partition but MS have not properly updated error messages from legacy bios days (crap programming).


    This is an image of the Microsoft error message seen with UEFI:

    Click image for larger version. 

Name:	we couldn't update the system reserved partiton UEFI.PNG 
Views:	7 
Size:	166.2 KB 
ID:	230369
      My ComputerSystem Spec

  4.    #24

    Kari said: View Post
    Martin, Microsoft seems to think differently:



    This from page already linked here a couple of times: create partition msr | Microsoft Docs

    Kari
    MS require it to be installed but it has no functionality. If you delete it, nothing is affected whatsoever. It is a purely artificial requirement.
      My ComputerSystem Spec

  5.    #25

    zbook said: View Post
    This is an image of the Microsoft error message seen with UEFI:

    Click image for larger version. 

Name:	we couldn't update the system reserved partiton UEFI.PNG 
Views:	7 
Size:	166.2 KB 
ID:	230369
    As I said the error is misleading. Look at the EFI system partition - it is almost full. That is what is causing your problem. You need to extend size of it (easier said than done as the pesky MSR partition gets in the way).

    You need to


    1) shrink C drive by say 105 MB from left using Minitool partition wizard free

    2) backup MSR only using Macrium Reflect

    3) Extend size of EFI partition by 100 MB (slightly lower than space created above to avoid zone boundary issues)

    4) recover MSR to space between EFI and C drive.

    You could just delete MSR and not bother or recreate it using diskpart instead if you prefer.

    UEFI only needs two partitions to run (EFI and C drive). On small devices, I used to delete the MSR and recovery partitions.

    However, the recovery partition is needed now if you use Marium Reflect Free in WinRe mode rather than older WinPE mode. WinRe mode gives ability to make Macrium Reflect bakupsierwifi which is great feature.
      My ComputerSystem Spec


  6. Posts : 25,055
    windows 10 professional version 1607 build 14393.969 64 bit
       #26

    cereberus said: View Post
    As I said the error is misleading. Look at the EFI system partition - it is almost full. That is what is causing your problem. You need to extend size of it (easier said than done as the pesky MSR partition gets in the way).

    You need to


    1) shrink C drive by say 105 MB from left using Minitool partition wizard free

    2) backup MSR only using Macrium Reflect

    3) Extend size of EFI partition by 100 MB (slightly lower than space created above to avoid zone boundary issues)

    4) recover MSR to space between EFI and C drive.

    You could just delete MSR and not bother or recreate it using diskpart instead if you prefer.

    UEFI only needs two partitions to run (EFI and C drive). On small devices, I used to delete the MSR and recovery partitions.

    However, the recovery partition is needed now if you use Marium Reflect Free in WinRe mode rather than older WinPE mode. WinRe mode gives ability to make Macrium Reflect bakupsierwifi which is great feature.

    For the Windows upgrade 15 MB was required.
    There was 12 MB available.
    The failure was due to a deficiency of 3 MB.
    After the next Windows build is released I'm planning to troubleshoot the upgrade failure.
    The method that I'm most familiar with is removing files to fix the failure and I'm interested in your method.
    I'll post a new thread in May/June.
      My ComputerSystem Spec


 
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