W-10 dual boot attempt fails. Selected disk of GPT type

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  1. cfourkays's Avatar
    Posts : 277
    W-10 Pro Insider Preview
       #1

    W-10 dual boot attempt fails. Selected disk of GPT type


    Trying to dual boot build 10130 iso on a fresh install of 8.1.
    Received a message:
    "Windows cannot be installed to this disk. The selected disk is not of the GPT partition style"
    Laptop is an Asus x550c.
    System recovery to Asus factory default.

    Asus has a default 4 Partition setup. I added a 5th, Partition 6, by shrinking Partition 4
    Looks something like this:

    Drive 0 Partition 3 128MB MSR (Reserved)
    Drive 0 Partition 4 OS 395GB Primary
    Drive 0 Partition 5 451MB Recovery
    Drive 0 Partition 6 New Volume 48GB Primary
    Drive 0 Partition 7 Restore 20GB Recovery

    I'm using the new Build 10130 iso which just came out.
    I don't want to use a VM like I have on a Desktop.

    Pete
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  2. Boozad's Avatar
    Posts : 1,625
    W7 Pro x64 | W10 IP x64 | Linux Mint VM
       #2

    Can you post a screenshot of disk management please. If you've created a fifth partition you've must have converted the disk to dynamic, do not reboot until you've posted that screenshot.
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  3. cfourkays's Avatar
    Posts : 277
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    Thread Starter
       #3

    Here you go:
    Attached Thumbnails Attached Thumbnails W-10 dual boot attempt fails. Selected disk of GPT type-disk-mgmt.jpg  
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  4. Boozad's Avatar
    Posts : 1,625
    W7 Pro x64 | W10 IP x64 | Linux Mint VM
       #4

    I'm not sure how that didn't turn into a Dynamic Disk but at least that's a bonus. How come you have three Recovery Partitions?

    Your disk must be MBR, although I'm not sure why that would stop W10 installing.
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  5. topgundcp's Avatar
    Posts : 2,616
    MintMate19x64 Win10Prox64
       #5

    Boozad said:
    I'm not sure how that didn't turn into a Dynamic Disk but at least that's a bonus. How come you have three Recovery Partitions?

    Your disk must be MBR, although I'm not sure why that would stop W10 installing.
    Based on what I saw in 100MB partition, his disk 0 is a GPT disk and that's why he can have more than 4 partitions. The MBR disk type usually marked as Active on the boot drive. However, The arrangement of those partitions do look strange to me though.

    @OP, to make sure what type of disk you have. Point the mouse at Disk 0 and right click->Properties->Volumes, it should tell you what partition type you have.
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  6. cfourkays's Avatar
    Posts : 277
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       #6

    I think the 2nd Recovery partition somehow happened during the system recovery.
    Attached Thumbnails Attached Thumbnails W-10 dual boot attempt fails. Selected disk of GPT type-volumes.jpg  
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  7. topgundcp's Avatar
    Posts : 2,616
    MintMate19x64 Win10Prox64
       #7

    OK. That's what I thought, so you have a GPT partition type and Windows 10 Installation got confused. If I am not mistaken, You got your Laptop with Windows 8 then upgraded to 8.1 and the update created a second Recovery Partition after the C drive. The last Partition is the factory image that come preloaded.

    A normal Windows installation would have the Recovery Partition 1st then the 100 MB partition, which contains the Boot Manager then a 128MB MSR partition that you don't see in Disk Management and last is your C drive.

    As stated earlier, the arrangement on those partitions are in reverse and may be that's why Windows 10 Installation does not see the sequence it expects to see.
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  8. cfourkays's Avatar
    Posts : 277
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       #8

    You're right about what happened now that I looked at it.
    The factory reset was to 8.
    I then upgraded it to 8.1.
    I'd prefer not cleaning the drive and converting it to MBR if there's away I can get 10 without doing that.
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  9. topgundcp's Avatar
    Posts : 2,616
    MintMate19x64 Win10Prox64
       #9

    cfourkays said:
    You're right about what happened now that I looked at it.
    The factory reset was to 8.
    I then upgraded it to 8.1.
    I'd prefer not cleaning the drive and converting it to MBR if there's away I can get 10 without doing that.
    When you create a new partition, one more thing you broke and now you can't even do a factory reset. The 20GB Recovery used to be partition 5, now it became partition 6. You'd need to run reagentc from the Admin command prompt to assign it to partition 6.

    However, Since the 20GB factory image is obsolete and I am not sure if you ever use it again. It would be better to start fresh with all the partitions correctly aligned so you won't have problem upgrading to Windows 10 in the future. This will involve re-doing everything correctly and I can assure the time it takes to re-do it is less than the time trying to re-align and fix the problem.

    Here's the steps I suggest to do:
    1. Delete the partition you've created (D: drive) and make a backup image of the whole disk 0 to an external drive
      using either: Macrium Reflect Free or AOMEI Backupper
    2. Download the latest Windows 8.1 core from: Create installation media for Windows 8.1 .
      Without any external device connected to the laptop and make sure the drive is unallocated.
      Re-install Windows 8.1 and let it creates all needed partitions.
    3. Shrink Drive C: to 100 GB then install Windows 10
    4. Shrink Drive ??? containing Windows 10 to 100GB
    5. Use the rest for personal data.
    Last edited by topgundcp; 07 Jun 2015 at 04:41.
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  10. cfourkays's Avatar
    Posts : 277
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       #10

    Thanks, Top.
    I'll give it a go later and post back.
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