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  1.    16 Sep 2016 #1
    Join Date : Mar 2016
    Posts : 16
    Windows 10

    clean install with anniversary update & disk conversion BIOS to UEFI


    I have an existing Windows 10 Pro installation. My partitions are:
    system reserved: 500 mb
    C: boot, page file, primary partition
    E: logical drive
    F: logical drive
    I would like to do a clean install with WIN 10 Anniversary Update (1607), and convert my disk from BIOS to UEFI.
    What modifications would i need to do to GPTgen while upgrading and maintaining my programs and data?

    Thanks
      My ComputerSystem Spec
  2.    16 Sep 2016 #2
    Join Date : May 2016
    Posts : 504
    Windows 10 Pro

    Modifications....none.

    Windows 10 already utilizes GPT partitioning....on a clean install. The only thing you would need to do is change your BIOS firmware from Legacy BIOS to UEFI BIOS. You will need to confirm that in your BIOS. Or to check with in windows.....in the search bar of cortana, type system information and when the window pops up, scroll down to BIOS mode......here's mine.

    Click image for larger version. 

Name:	system info.JPG 
Views:	10 
Size:	114.3 KB 
ID:	101728
      My ComputerSystem Spec
  3.    16 Sep 2016 #3
    Join Date : Mar 2016
    Posts : 16
    Windows 10
    Thread Starter

    Can I do a clean install AND keep my programs and data? with GPTgen?
      My ComputerSystem Spec
  4.    17 Sep 2016 #4
    Join Date : May 2016
    Posts : 504
    Windows 10 Pro

    No....a clean install is just that, a clean install. It wipes/formats the HDD/SSD of everything. If you have any data you want to keep....back it up/save it.
      My ComputerSystem Spec
  5.    17 Sep 2016 #5
    Join Date : Dec 2015
    Posts : 5,352
    Windows10

    You would have to update as legacy bios first, then it is possible to make an image backup of c drive using Macrium Reflect Free, clean install windows 10 in uefi mode,and then restore C drive overwriting clean installed partition.

    You might need to repair the boot files but Macrium will do that as well.
      My ComputerSystem Spec
  6.    17 Sep 2016 #6
    Join Date : Mar 2016
    Posts : 16
    Windows 10
    Thread Starter

    Quote Originally Posted by cereberus View Post
    You would have to update as legacy bios first, then it is possible to make an image backup of c drive using Macrium Reflect Free, clean install windows 10 in uefi mode,and then restore C drive overwriting clean installed partition.

    You might need to repair the boot files but Macrium will do that as well.
    Cereberus, is there a link with those Macrium instructions, including the boot file repair? Doesn't overwriting the clean install negate the clean install?
      My ComputerSystem Spec
  7.    17 Sep 2016 #7
    Join Date : Sep 2014
    DFW Area
    Posts : 431
    Windows 8&10

    There may be some crossover misunderstandings as to what is what. A hard drive is either configured as Legacy (MBR) or GPT.

    A UEFI install can only be done to a GPT configured drive which has different critical partitions than a Legacy install.

    There are ways to convert over but can be dangerous.

    And the last thing is if you have activated a Legacy install of Windows 10, can you do a clean install as UEFI and get it to activate... I don't know.
      My ComputerSystem Spec
  8.    18 Sep 2016 #8
    Join Date : Oct 2013
    Posts : 335
    Windows 10 Pro x64, Windows 7 Ultimate x64 SP1, Windows 8.1 Pro x64

    Quote Originally Posted by Saltgrass View Post
    And the last thing is if you have activated a Legacy install of Windows 10, can you do a clean install as UEFI and get it to activate... I don't know.
    Activation is no issue. If it was activated, it will remain so once the clean install is completed. MBR or UEFI does not matter.
      My ComputerSystem Spec
  9.    18 Sep 2016 #9
    Join Date : Dec 2015
    Posts : 5,352
    Windows10

    Quote Originally Posted by marymmcc View Post
    Cereberus, is there a link with those Macrium instructions, including the boot file repair? Doesn't overwriting the clean install negate the clean install?
    Many guides on web and youtube how to create an image backup using Macrium.

    First shrink C drive by say 1 GB to create a bit of space.

    Then make image backup of pc to another drive.

    I will assume you have got this far.

    Run Macrium and select "other tasks" and create a menu boot entry.

    Boot PC and select Macrium from dual boot option. See video link (unfortunately it does not record cursor, so I will try and explain in words).

    https://dl.dropboxusercontent.com/u/...8_16_31_28.wmv

    Click on Restore, and click "browse for image file", and navigate to your image backup

    Click on C drive and click on actions that pops up and select "restore this partition"

    You will see destination disk in lower window of next screen

    Click on C drive, and click "delete existing partition"

    Click on C drive in upper image Source and drag to free space where C drive was on destination.

    The click next etc, and restore C partition.

    When it has restored, select "restore tab", click "fix windows boot problems" and then click next, finish.
      My ComputerSystem Spec
  10.    18 Sep 2016 #10
    Join Date : Jun 2016
    Posts : 1,462
    Win10 1607

    Quote Originally Posted by marymmcc View Post
    Cereberus, is there a link with those Macrium instructions, including the boot file repair? Doesn't overwriting the clean install negate the clean install?

    Yes it does but it is how you get the required GPT Partitions made for you AND save all your Data....

    This is my writeup from about 2 months ago.....

    Solved Small Wrinkle in Anniversary Update....MBR Disk - Windows 10 Forums

    I have since made a Macrium Image of my 1st 3 GPT partitions so I can use it instead of reinstalling Win10 to get them in the future.

    There is a link in the Post above to a copy of Topgun's 3 partition image, you can use if you don't want to reinstall Win10 , ie save time. Topgun's file took about 40 secs to restore. You could make your own on another computer too if it has GPT partitions.


    KB

    .
      My ComputerSystem Spec

 
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