Any official news on when Microsoft is going to fix what seems to be a widespread error 12 on eGPU's with their newest update?  

@jackson_patenaude

What version does "winver" say you have?

What items show in the Uninstall Windows Updates list? 

@jackson_patenaude

In order to downgrade, you'll have to install the .295 update package first. Then you uninstall any windows update that isn't .295.

@macbackpro

How is that done? I've tried downloading the .295 update from the microsoft catalogue, but whenever I try and run it, it just says this update is not applicable to your computer. My Macbook is currently on 17763.379, 1809.

@joevt

17763.379, 1809

I've tried downloading the update to the .295 update, but whenever I try and install it, it says it isn't applicable to my system. 

@jackson_patenaude

This is what I did a little while ago. - https://egpu.io/forums/pc-setup/egpu-fail-after-update-to-windows-19-03/paged/3/#post-66080

I’m using 1903. I listed the correct package in there. Its been a little while but there should be a page that allows you to download the .msi for the windows update. It will run, you reboot, then uninstall anything update, not security patch, that isn’t the one you just updated.

@jackson_patenaude

1809 isn't as eGPU friendly as 1903 up to version 295... Since my bootcamp instance is my fun instance (I don't have it built), I can rebuild it (though some reinstalls of games is a pain in the buttocks). 

I'm not sure if the May 2019 update is still the version 3 (or .3 as the case may be). You'll want a .3 install, let Windows do all its updates.... then uninstall any (or all) of the following.... 

• October 8, 2019—KB4517389 (OS Build 18362.418)
• October 3, 2019—KB4524147 (OS Build 18362.388)
• September 26, 2019—KB4517211 (OS Build 18362.387)
• September 23, 2019—KB4522016 (OS Build 18362.357)
• September 10, 2019—KB4515384 (OS Build 18362.356)
• August 30, 2019—KB4512941 (OS Build 18362.329)

Once you're all set, you'll want to ONLY install the following...a few reboots later and you should be at build 3 of 18362... you want build 295 of 18362...

• August 13, 2019—KB4512508 (OS Build 18362.295) which can be found Microsoft Update Catalog
  • "2019-08 Cumulative Update for Windows 10 Version 1903 for x64-based Systems (KB4512508)"
  • be careful one is for SERVER, that is not the one that will work with Bootcamp...

I hope this post was useful, it has been repeated a few times around here but never hurts to repost it.

@ttamnogard

Okay, so just to be clear; first I want to do a fresh install of the May 2019 ISO that shows up on the ISO downloader from Microsoft. Install, let it do its thing from MacOS bootcamp. Then, uninstall all the patches from windows update that you just linked. Reboot. Then, pause Windows Update, and manually download the x86 1903 .295 patch, and install it?

Thank you btw, you guys have all been lots of help. 🙂

@jackson_patenaude Yes, that sound about right. You should probably see only the latest of the patches to be uninstalled (v418). Uninstalling it should make winver report v1. Then you can install 295.

I've gone with 1809 for now, hoping that by the time I'm forced to update there will be a fix in place. 

@joevt

Hey, so I've uninstalled everything windows will let me, but when I try and install the .295 update it says that this update is not needed, or something to that effect.

Posted by: @ttamnogard

@jackson_patenaude

1809 isn't as eGPU friendly as 1903 up to version 295... Since my bootcamp instance is my fun instance (I don't have it built), I can rebuild it (though some reinstalls of games is a pain in the buttocks). 

Not true in my experience. 1803 and 1809 are the most eGPU friendliest Windows OS ever. 1903 later up to version 295 is ok, but nothing special.

I had the same issue after installing the later of the two Win10 .iso files currently officially available, which was 1903 build .385 I think. I couldn't figure out how to roll back to a point where I could install the .295 build, had the same issue with the .msi file not being applicable and ultimately just wiped the bootcamp partition and installed 1809. After some setup clunkiness, it's working well for me.

As of right now, installing 1903 V2 from the Microsoft download page does not let you uninstall the built-in OS patches (which leaves you stuck at 18362.418 or higher I think)

If you want to 18362.295, you’ll need to find an ISO for 1903 V1, aka 18362.30, and install the patch from the windows update database for 18362.295.

Hey, so I've managed to get Windows back down to 18362.30. However, I'm still getting the error 12 message. I'm wondering what I should do from this point on? Thank you.