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  1.    10 Jun 2017 #50
    Join Date : Dec 2015
    Posts : 5,878
    Windows10

    Quote Originally Posted by ArnoldLayne View Post
    It's about time Windows included this tool. Worked perfectly for me. I was searching the internet for a way to do this without having to wipe my OS drive and re-partition or purchasing a pro version of a partitioning tool.
    It was not that difficult to do. You basically had to image backup current C drive, then clean install Windows 10 as UEFI, then restore image overwriting c drive, making sure you had all the right files in c:\windows\boot directory (I copy that directory from clean install to a backup drive just in case). However, no need to do that anymore if running 1703.
      My ComputerSystem Spec
  2.    10 Jun 2017 #51
    Join Date : May 2017
    Posts : 23
    Windows 10 Home 1703

    Quote Originally Posted by cereberus View Post
    It was not that difficult to do. You basically had to image backup current C drive, then clean install Windows 10 as UEFI, then restore image overwriting c drive, making sure you had all the right files in c:\windows\boot directory (I copy that directory from clean install to a backup drive just in case). However, no need to do that anymore if running 1703.
    Not difficult, but time consuming. Took less than a few minutes to run mbr2gpt, reboot, and change bios to UEFI.
      My ComputerSystem Spec
  3.    10 Jun 2017 #52
    Join Date : Dec 2015
    Posts : 5,878
    Windows10

    Quote Originally Posted by ArnoldLayne View Post
    Not difficult, but time consuming. Took less than a few minutes to run mbr2gpt, reboot, and change bios to UEFI.
    Sure but mbr2gpt only works with W10 version 1703. You can use a 1703 installtion drive though to convert older versions.
      My ComputerSystem Spec
  4.    03 Jul 2017 #53
    Join Date : Jul 2017
    Posts : 2
    Windows 10 x64

    I realize it's recommended to install a new OS when changing mainboards rather than keeping your current installation and just installing new drivers, but I've done it before and intend to do it again.

    I can't see why adding a BIOS to UEFI conversion to the mix would be problematic, but has anyone tried this before? Should just be a matter of running the conversion, then swapping out CPU/mainboard/RAM, then booting up the new rig in UEFI.
      My ComputerSystem Spec
  5.    03 Jul 2017 #54
    Join Date : Oct 2013
    Posts : 25,185
    64-bit Windows 10 Pro build 17040
    Thread Starter

    Hello Ralphus, and welcome to Ten Forums.

    As long as everything in the red warning box at the top of the tutorial checks out ok, you shouldn't have any issues converting to UEFI.

    Of course, I would always recommend to back up anything that you do not want to lose first to be extra safe.
      My ComputersSystem Spec
  6.    03 Jul 2017 #55
    Join Date : Jul 2017
    Posts : 2
    Windows 10 x64

    Thanks for the welcome, and the reassurance.
      My ComputerSystem Spec
  7.    06 Jul 2017 #56
    Join Date : Jul 2015
    Posts : 4
    Windows 10

    Thanks, works fine with an Intel 600P 256GB m.2 SSD Windows 10 1703 with Asus Prime B250 Plus motherboard 0808 bios.
      My ComputerSystem Spec
  8.    21 Jul 2017 #57
    Join Date : Jul 2017
    Posts : 5
    Windows

    Wishing I hadnt tried this, now wont boot. Had a perfectly good running ASUS K60IJ, am hoping someone can help. I could not find the uefi option in the bios. Cant boot from windows 10 or linux flash drive either. After the splash screen all i see is in the attachment.

    Click image for larger version. 

Name:	NCM_0014.JPG 
Views:	30 
Size:	295.3 KB 
ID:	144913
      My ComputerSystem Spec
  9.    21 Jul 2017 #58
    Join Date : Oct 2013
    Posts : 25,185
    64-bit Windows 10 Pro build 17040
    Thread Starter

    Hello @DaLee, and welcome to Ten Forums.

    Check to see if you may have a "CSM" type setting instead to disable in your UEFI firmware settings.
      My ComputersSystem Spec
  10.    21 Jul 2017 #59
    Join Date : Jul 2017
    Posts : 5
    Windows

    Thanks for responding Brink. Looks as if this PC does not have uefi firmware settings only bios, came with windows 7 originally. Was finally able to figure how to boot from flash drive at a cold boot after changeing a few settings in bios and video taping the display to catch the text on the screen as it flew by.

    Is there a chance of a bios upgrade that may give the uefi option needed? Am looking now for newer version, wasnt any during the free W10 update. Currently has AMIBIOS Version 206

    In a worst case scenario would a fresh install get me back to mbr ok?

    Would there be a command prompt to revert back without losing data?

    Or does this not work at all...
    Convert GPT drive into MBR using Command Prompt (cmd).
      My ComputerSystem Spec

 
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