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You are here: Home / Operating System / Windows 2008 R2 / Upgrading Windows 2008R2 DC to Windows 2012R2

Sep 11, 2016 By Jared Heinrichs Leave a Comment

Upgrading Windows 2008R2 DC to Windows 2012R2

When you try to upgrade a Windows 2008R2 Dc to Windows 2012R2 you will notice that you most likely can’t.

Depending on your setup you will most likely get one or two of these errors.

  1. System Devices: Microsoft Emulated S3 Device CapThe S3
    1. This is a non-critical error if you are running the system on a first generation Hyper-v virtual machine. Video driver isn’t supported in Windows 2012r2.
  2. Active Directory on this domain controller does not contain Windows 2012 ADPREP /FORESTPREP updates.
    • The domain needs to be prepped. The link Microsoft provides might give you some insight but does not contain the correct info.
    • The link they provide is: http://go.microsoft.com/fwlink/?linkid=113955 – This link isn’t correct. See info further down in the post.

Here’s what the report looks like. It’s located on your desktop after a failed upgrade.

report-dc-upgrade

As you can see the link only talks about upgrading from really old OS’s to 2008/2008R2 domain controllers and not 2012r2.

At step 4 it says to run adprep from the OS disk to prepare the machine.

  • D:\sources\adprep\adprep /forestprep

ADPrep is no longer found in this directory! It now can be found in:

  • D:\Support\Adprep

forestprep-01

It will run and you will be presented with some info. The main parts are:

  • All Dc’s Must be Windows 2003 or later
  • Can’t be reversed
  • Hit “C” to continue
  • Hit “ENTER” to EXIT

The command output is a few screens in length. Here is the output of the command in my test DC.

forestprep-03

forestprep-04

Now guess what! You also have to upgrade:

  • Domain:
    • adprep /domainprep
  • Group Policy
    • adprep /domainprep /gpprep
  • RoDC
    • adprep /rodcprep

These commands are similar to the first ADPREP command you entered.

Here is the output from those commands:

forestprep-05

The group policy should already be updated but I like to still run the command to make sure:

forestprep-06

Again you shouldn’t need to run this command but I do it anyways to make sure:

forestprep-07

Rerun the install and you will see you can now hit “NEXT” after the compatibility report!

windows28-dc-upgrade

Voila! Your Upgrade is underway!

windows28-dc-upgrade-01

Filed Under: Windows 2008 R2, Windows 2012R2

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