Contribute
Register

Can't install Windows 10 UEFI next to MacOS High Sierra on same SSD

Status
Not open for further replies.
Joined
Oct 11, 2017
Messages
74
Motherboard
Lenovo 510s-14isk (OpenCore UEFI)
CPU
i5-6257u
Graphics
Iris 550, 1920x1080
Hi everyone,
I have tried over and over again to install Windows 10 on the same SSD (the only one I have on my laptop) but I always get the same error.
The procedure I have followed is this one.
1)I have installed MacOS with Clover UEFI after setting the BIOS:
  • LEGACY SUPPORT
  • UEFI first
  • Disable fast boot
  • Disable secure boot
2)I partitioned the drive with:
  • MacOS (already installed) -> APFS
  • Windows10 -> MacOS Extended Journaled (about 60gb)
3)I have booted into Windows 10 EFI from boot menu using both a USB 2 and 3 port.
ALTERNATIVE 1
4)I have deleted Windows10 partition and created a new one
5)I get this error when selecting the primary partition created:
"We couldn't create a new partition or locate an existing one. For more information, see the Setup log files"
ALTERNATIVE 2
4)I have deleted Windows 10 partition and hit next
5)I get this error:
"Windows could not prepare the computer to boot into the next phase of installtion. To install Windows, restart the installation"

I will attach 2 photos I have taken of the errors.
Drive 0 partition 1 is the EFI partition where CLOVER is installed which is not visible in the photo.
Drive 0 partition 2 contains MacOS.
 

Attachments

  • ALTERNATIVE1.jpg
    ALTERNATIVE1.jpg
    688.5 KB · Views: 564
  • ALTERNATIVE2.jpg
    ALTERNATIVE2.jpg
    2.2 MB · Views: 989

RehabMan

Moderator
Joined
May 3, 2012
Messages
184,624
Motherboard
Intel DH67BL
CPU
i7-2600K
Graphics
HD 3000
Mac
  1. MacBook Air
Mobile Phone
  1. iOS
Hi everyone,
I have tried over and over again to install Windows 10 on the same SSD (the only one I have on my laptop) but I always get the same error.
The procedure I have followed is this one.
1)I have installed MacOS with Clover UEFI after setting the BIOS:
  • LEGACY SUPPORT
  • UEFI first
  • Disable fast boot
  • Disable secure boot
2)I partitioned the drive with:
  • MacOS (already installed) -> APFS
  • Windows10 -> MacOS Extended Journaled (about 60gb)
3)I have booted into Windows 10 EFI from boot menu using both a USB 2 and 3 port.
ALTERNATIVE 1
4)I have deleted Windows10 partition and created a new one
5)I get this error when selecting the primary partition created:
"We couldn't create a new partition or locate an existing one. For more information, see the Setup log files"
ALTERNATIVE 2
4)I have deleted Windows 10 partition and hit next
5)I get this error:
"Windows could not prepare the computer to boot into the next phase of installtion. To install Windows, restart the installation"

I will attach 2 photos I have taken of the errors.
Drive 0 partition 1 is the EFI partition where CLOVER is installed which is not visible in the photo.
Drive 0 partition 2 contains MacOS.

Correct way is to format (as NTFS, within the Windows installer) the placeholder HFS+J partition you created, then direct the installer to install to that partition.
 
Joined
Oct 11, 2017
Messages
74
Motherboard
Lenovo 510s-14isk (OpenCore UEFI)
CPU
i5-6257u
Graphics
Iris 550, 1920x1080
Correct way is to format (as NTFS, within the Windows installer) the placeholder HFS+J partition you created, then direct the installer to install to that partition.
I have just tried again to be sure it was partitioned to HFS+J correctly so I have done it via diskutil.
When I boot into Windows setup I can only delete the partition and not format it. When I delete it and create a new one I get the same error as ALTERNATIVE1. May I have to format the partition via diskpart?
 
Joined
Apr 21, 2016
Messages
1,009
Motherboard
ASUS X556UA-Clover
CPU
i5-6200U
Graphics
HD 520,1366x768
Mobile Phone
  1. iOS
I have just tried again to be sure it was partitioned to HFS+J correctly so I have done it via diskutil.
When I boot into Windows setup I can only delete the partition and not format it. When I delete it and create a new one I get the same error as ALTERNATIVE1. May I have to format the partition via diskpart?
From my experience, I remember you should just select the unallocated space in the Windows installer after you delete the placeholder partition, then install the OS. No need to create an NTFS/whatever partition via the Windows installer.
 
Joined
Oct 11, 2017
Messages
74
Motherboard
Lenovo 510s-14isk (OpenCore UEFI)
CPU
i5-6257u
Graphics
Iris 550, 1920x1080
From my experience, I remember you should just select the unallocated space in the Windows installer after you delete the placeholder partition, then install the OS. No need to create an NTFS/whatever partition via the Windows installer.
After doing as you say I get an error as reported in ALTERNATIVE 2 :(
Anyway those should be created anyway when hitting "Next" on the installer so we are back at the starting point.
 

RehabMan

Moderator
Joined
May 3, 2012
Messages
184,624
Motherboard
Intel DH67BL
CPU
i7-2600K
Graphics
HD 3000
Mac
  1. MacBook Air
Mobile Phone
  1. iOS
I have just tried again to be sure it was partitioned to HFS+J correctly so I have done it via diskutil.
When I boot into Windows setup I can only delete the partition and not format it. When I delete it and create a new one I get the same error as ALTERNATIVE1. May I have to format the partition via diskpart?

Use diskpart.exe from cmd.exe. You can get a cmd.exe instance with Shift+f10.
 
Joined
Oct 11, 2017
Messages
74
Motherboard
Lenovo 510s-14isk (OpenCore UEFI)
CPU
i5-6257u
Graphics
Iris 550, 1920x1080
Use diskpart.exe from cmd.exe. You can get a cmd.exe instance with Shift+f10.
I still get the same error, could you explain me better which partitions and relative type to create in diskpart? I still assume I have to delete the HFS+J partition created from MacOS before creating them in diskpart right?
 

RehabMan

Moderator
Joined
May 3, 2012
Messages
184,624
Motherboard
Intel DH67BL
CPU
i7-2600K
Graphics
HD 3000
Mac
  1. MacBook Air
Mobile Phone
  1. iOS
I still get the same error, could you explain me better which partitions and relative type to create in diskpart? I still assume I have to delete the HFS+J partition created from MacOS before creating them in diskpart right?

Just format the placeholder HFS+J partition to NTFS using diskpart.exe 'format' command.
If you are not familiar with diskpart, you should read the documentation.
 
Joined
Oct 11, 2017
Messages
74
Motherboard
Lenovo 510s-14isk (OpenCore UEFI)
CPU
i5-6257u
Graphics
Iris 550, 1920x1080
Just format the placeholder HFS+J partition to NTFS using diskpart.exe 'format' command.
If you are not familiar with diskpart, you should read the documentation.
This is the output I get when using diskpart.
I can't select the volume (placeholder HFS+J partition) because it is not visible to format it (with diskpart format).
 

Attachments

  • IMG_20171202_003839.jpg
    IMG_20171202_003839.jpg
    3.1 MB · Views: 367
  • IMG_20171202_003942.jpg
    IMG_20171202_003942.jpg
    3.1 MB · Views: 355
  • IMG_20171202_005241.jpg
    IMG_20171202_005241.jpg
    3.1 MB · Views: 333
Last edited:

RehabMan

Moderator
Joined
May 3, 2012
Messages
184,624
Motherboard
Intel DH67BL
CPU
i7-2600K
Graphics
HD 3000
Mac
  1. MacBook Air
Mobile Phone
  1. iOS
This is the output I get when using diskpart.
I can't select the volume (placeholder HFS+J partition) because it is not visible to format it (with diskpart format).

No need to select a volume to format a partition. Format operates on the selected partition, not a selected volume.
 
Status
Not open for further replies.
Top