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Windows 10 Security update (KB4579311), breaks Blender. (Won't fully launch)
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Description

System Information
Operating system: Windows 10 18941.508
Graphics card: Nvidia GeForce RTX 2060

Blender Version
Broken: I tired to launch both of the current versions of 2.90.1 and 2.83 LTS; both failed to launch.
Worked: None.

Short description of error

Windows asked me to install a Security update: (KB4579311)
After doing so, no versions of Blender would launch properly.
They would launch to the point of showing a grey window, but the UI would never load.

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).
-I would say it is caused by the Windows update. I uninstalled it using some command line instructions I found online,
as it would not allow me to uninstall it from the updates ui (Remove updates, etc.)

After removing it, blender once again works fine. .Just wanted to warn the devs, and hopefully this will help a resolution to be found quickly.

Related Objects

Event Timeline

Matthew Perkins (mcolinp) renamed this task from Windows 10 Security update (KB4579311), breaks blende. (Won't fully launch) to Windows 10 Security update (KB4579311), breaks Blender. (Won't fully launch).Oct 19 2020, 2:46 AM
Matthew Perkins (mcolinp) created this task.
Jesse Yurkovich (deadpin) added a subscriber: Jesse Yurkovich (deadpin).Oct 19 2020, 3:21 AM

I'm not able to confirm with a newer release of Windows here -- the "2004" or 20H1 build:
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1070 with Max-Q Design/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 451.67

I have the same security update and 2.90.1 and latest master work fine for me:

Matthew Perkins (mcolinp) added a comment.Oct 19 2020, 3:41 AM

Makes me wonder if it’s not tied to RTX cards?

Matthew Perkins (mcolinp) added a comment.Oct 21 2020, 3:19 AM

I'm not certain it was connected to the Windows Security update, but that was the only thing that changed, when it started acting up. I still cannot get Blender to launch, and I was in the middle of a project someone is waiting on me for. VERY FRUSTRATING. So far I tried uninstalling Blender 2.90.1 then reinstalling it. I tried rolling back Nvidia's Studio Drivers. I tried using CCleaner to clean the Registry. Still, nothing.

Matthew Perkins (mcolinp) added a comment.EditedOct 21 2020, 3:28 AM

Ok, so something weird just happened . . .

I took this screenshot of 2.90.1 failing to launch, using 'Snipping Tool'. after I saved this screenshot, it finally loaded. Yet then after closing it and trying again . . . it of course doesn't load . . .

Leul Mulugeta (Leul) added a subscriber: Leul Mulugeta (Leul).Oct 21 2020, 5:41 AM

in Windows Update, in Update History, there is an option to Uninstall Updates, Maybe you can try that if your on your own personal computer

Richard Antalik (ISS) changed the task status from Needs Triage to Needs Information from User.Oct 21 2020, 8:17 AM
Richard Antalik (ISS) added a subscriber: Richard Antalik (ISS).

Please download build from https://builder.blender.org/download/ and try to start Blender using blender_debug_log.cmd file. After crash happens, upload created files.

Matthew Perkins (mcolinp) added a comment.EditedOct 22 2020, 3:32 AM

So I did try uninstalling the security update previously. After I did that, 2.90.1 launched successfully once, then failed to launch again every try after. I did just now download the 2.91 build, which also failed to launch. I am attaching the log output text here.

blender_debug_output.txt0 BDownload

Matthew Perkins (mcolinp) added a comment.EditedOct 22 2020, 4:18 AM

Ok, so I found some developments. Anyone who has this problem can fix it by adjusting "Exploitation Settings" In Widows Security. It seems something in the updated security update, seems to regard Blender as a threat. I have never seen these new settings shown in the pictures attached below. I tried this on 2.90.1, and it worked. On 2.91, it worked. On 2.83 (LTS), it DID NOT work. But at least I can use 2.90.1 as I was previously.

Step 1:

Step 2:

Step 3:

Step 4:

Matthew Perkins (mcolinp) added a comment.Oct 22 2020, 4:21 AM
This comment was removed by Matthew Perkins (mcolinp).
Matthew Perkins (mcolinp) added a comment.Oct 22 2020, 4:21 AM
This comment was removed by Matthew Perkins (mcolinp).
Matthew Perkins (mcolinp) added a comment.Oct 22 2020, 4:22 AM
This comment was removed by Matthew Perkins (mcolinp).
Richard Antalik (ISS) mentioned this in T80447: Blender Crashes When Opening a file with it's file Browser, and subsequently on startup..Oct 22 2020, 2:25 PM
Matthew Perkins (mcolinp) added a comment.EditedOct 24 2020, 6:29 PM

So the 'Fix" I described earlier, still does not result in a permanent fix in my case. It seems whatever changed in the KB4579311 security update, has caused some major havoc, only for a select number of users. I guess I got lucky, if you want to call it that . . .

Here is an article that seems to indicate Microsoft acknowledges there are some issues with this update, yet they don't specify to what extent those issues exist, and how may users are effected.

Windows10-october-update-breaking-pcs

Richard Antalik (ISS) closed this task as Archived.Oct 27 2020, 5:25 AM
Richard Antalik (ISS) claimed this task.

Thanks for looking into this. Unfortunately I don't think there is anything we can do here, if the problems are caused by OS. I can see that I have KB4579311 installed myself, and I haven't noticed any problem though.

I will have to close this report, and refer you to one of the community websites: https://www.blender.org/community/ where you can seek help and discuss possible solutions.

Richard Antalik (ISS) mentioned this in T82038: Blender closes instantly after i open it .Oct 27 2020, 9:07 AM