ClassicConnect

[dkay]

Final Product
(MSE not included but can be installed very easily)

(click image for full resolution)

Preface
Much of this post assumes you are using an MSDN copy of Windows 7 64-bit with SP1. Most things should apply to the later 2018 ISO Microsoft hosted for some time, but no guarantees of everything working as expected.
If you are looking to slipstream drivers into your ISO, I would recommend also slipstreaming the below Certificate Update, but would advise against slipstreaming other updates as I have found this can cause issues with the OOBE.

Root Certificate Updates
After you first install Windows, you will need to install KB3004394-v2 (note that you cannot find this update on Microsoft Update Catalog). This update is needed to do just about anything in the OS. If you don't you will get certificate errors in the browser, Windows online activation won't work, and drivers/software will complain that they are unsigned.

Fixing Windows Update
Next, we will need to get Windows Update working by installing the following updates (in-order):

1. KB3138612
   
2. KB3145739
   
3. KB3125574
   
4. KB3125574
   
5. KB4474419
   
6. KB4490628
   
7. KB4531786
   
   I would advise against installing the updates below as I had them cause issues with DirectX, making the system unusable, but it can save a significant amount of time on the updates later on.
   
8. KB3125574
   
9. KB4530734
   

Updating to 01-2020
Now with Windows Update working, we need to get the system up-to-date up until 01-2020. This is just a matter of checking for updates, doing the ones it finds, restarting, and repeating until it's done. Time consuming but not much you can do to make it faster..

Enabling Microsoft Update
In the meantime you can enable Microsoft Update to get updates for other Microsoft products.

Run the below script as admin, click the "Click here for details" link (you will need to re-open the Windows Update window to see it), then press yes on the popup.