1.    01 Mar 2016 #1
    Join Date : Jan 2016
    Posts : 9
    Windows 10 Build 10586

    Can BU of a Win10 OS that has been on MBR disk be recovered to GPT dsk


    I have Win10 installed into a system which is UEFI but on an MBR disk. I have a recent backup and want to delete all partitions on that disk and convert it to GPT. Do I need to start over with a clean install of Win7 on the MBR disk and then do the free upgrade to Win10? Or would I be able to do a restore of my Win10 from backup?

    In other words, I am asking if the Win10 which I presently have installed on my MBR disk must always be installed on an MBR disk or if it is possible for it to be recovered to the disk after it has been converted to GPT.
      My ComputerSystem Spec
  2.    01 Mar 2016 #2
    Join Date : Nov 2015
    Posts : 2,962
    64bit Win 10 Pro ver 1709 Build 16299.125

    You will be able to convert disk to GPT and then do a clean install of W10, during the install you skip the product key entry and it will activate automatically later on.
      My ComputersSystem Spec
  3.    01 Mar 2016 #3
    Join Date : Oct 2014
    Arnold, MD
    Posts : 29,746
    Triple boot - Win 10 Pro, Win 10 Pro Insider (2) - (and a sprinkling of VMs)

    Quote Originally Posted by edkugler View Post
    I have Win10 installed into a system which is UEFI but on an MBR disk. I have a recent backup and want to delete all partitions on that disk and convert it to GPT. Do I need to start over with a clean install of Win7 on the MBR disk and then do the free upgrade to Win10? Or would I be able to do a restore of my Win10 from backup?

    In other words, I am asking if the Win10 which I presently have installed on my MBR disk must always be installed on an MBR disk or if it is possible for it to be recovered to the disk after it has been converted to GPT.
    If I understand correctly, you want to convert your existing installed OS from MBR to GPT. The free tool Mini-Tool Partition can convert your drive partitions from MBR to GPT and align them correctly if needed. You may not have to reinstall or restore an image. I have done this, very easy, and successful.

    And the price is right! $0.00! Free MiniTool Partition Manager—Partition Wizard

    Direct link to download:
    http://www.minitool.com/partition-ma...zard-home.html
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  4.    01 Mar 2016 #4
    Join Date : Jun 2014
    Posts : 559
    Microsoft Windows 10 Pro 64-bit
      My ComputerSystem Spec
  5.    01 Mar 2016 #5
    Join Date : Aug 2015
    Penn's Woods
    Posts : 1,288
    Windows 10 Home

    Quote Originally Posted by sml156 View Post
    I'm curious what does BU mean
    BackUp
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  6.    02 Mar 2016 #6
    Join Date : Dec 2015
    Posts : 6,448
    Windows10

    I could be wrong but pretty certain you cannot restore an mbr based OS backup to gpt or vice versa.
      My ComputerSystem Spec
  7.    02 Mar 2016 #7
    Join Date : Oct 2014
    Arnold, MD
    Posts : 29,746
    Triple boot - Win 10 Pro, Win 10 Pro Insider (2) - (and a sprinkling of VMs)

    Quote Originally Posted by cereberus View Post
    I could be wrong but pretty certain you cannot restore an mbr based OS backup to gpt or vice versa.
    That is exactly why my post #3.
      My ComputersSystem Spec
  8.    06 May 2016 #8
    Join Date : Jan 2016
    Posts : 9
    Windows 10 Build 10586
    Thread Starter

    Quote Originally Posted by f14tomcat
    If I understand correctly, you want to convert your existing installed OS from MBR to GPT. The free tool Mini-Tool Partition can convert your drive partitions from MBR to GPT and align them correctly if needed. You may not have to reinstall or restore an image. I have done this, very easy, and successful.

    And the price is right! $0.00! Free MiniTool Partition Manager—Partition Wizard

    Direct link to download:
    http://www.minitool.com/partition-ma...zard-home.html
    From edkugler to f14tomcat:

    Thanks for the quick and helpful suggestion. However, when I select the "Convert MBR to GPT Disk" in the MiniTool Partition Manager, I get the error message: "This disk contains system partition and converting this disk to GPT style will cause your system to be unbootable."

    That is specifically what I am trying to avoid. I want to retain my bootable Windows 10 when I convert the disk containing it from MBR to GPT.

    I have a multi-boot consisting of Win 10 on one SSD and Win 7 on a second one. Both of these SSDs are MBR and, one at a time, I want to convert each of them to GPT without making my operating systems unbootable. Do you have any further suggestions? I really, really want to be able to do this.

    Thanks.
      My ComputerSystem Spec

 


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