ArcGIS Pro Crash - Suspected Windows Update

[EdDempsey]

This morning I awoke to several users saying that ArcGIS Pro will not open.   It crashes immediately at the "Initializing..." point of the splash screen.   Windows update ran on all 3 machines last night, see those updates below.

I have confirmed on a machine that did not receive these updates that ArcGIS Pro is still running correctly, so I would assume that rules out any issues with our License Manager. 

Has anyone else experienced this today?   

[DanPatterson_Retired]

My updates list from today caused no issue but I am using Windows 10 and some on your list don't appear on mine

[George_Thompson · Accepted solution]

Can you roll back the updates to see which one is causing the issue?

You may want to open a new Support case and work with an analyst to determine the issue. There have been some issues with a MS update: Meltdown and Spectre Processor Vulnerabilities | ArcGIS Blog 

[EdDempsey]

Thanks for the tip, George.  I rolled back KB4055002 and now it's running again.   May drop a line to support if this is a true conflict.

[George_Thompson]

Hi Ed - That KB you listed above is not in the screenshot?

Update: I do see that KB4055002 seems to include the KB's listed above, correct?

https://support.microsoft.com/en-us/help/4055002/description-of-the-security-and-quality-rollup-for-... 

[DanPatterson_Retired]

https://support.microsoft.com/en-ca/help/4055002/description-of-the-security-and-quality-rollup-for-...  if that is the number... which is why my install wasn't affected

[EdDempsey]

My screenshot above was from:

Control Panel\All Control Panel Items\Windows Update\View update history

Yet when I went to Control Panel\All Control Panel Items\Program and Features\Installed Updates, there were two updates installed yesterday under .NET Framework 4.7.1.  One was KB4055002, the other KB4054852.   I tried KB4055002 first and it worked.

[George_Thompson]

Roger that, thanks!

[RandallWilliams]

Hi Ed, thanks for reporting this issue. I've reproduced this issue in house on a Windows 2008 r2 machine.

Steps are:

1. install .net 4.7.1

2. Install KB KB4055002

If earlier versions of .net are installed, KB4055002 doesn't impact PRO.

I've reported this issue to Esri Development.

[RandallWilliams]

While I'm unsure at this point, I think this issue may be related to the MS notice regarding the .net 4.7.1 security rollup.

https://blogs.msdn.microsoft.com/dotnet/2018/01/09/net-framework-january-2018-security-and-quality-r...

"Please avoid installing this update on Windows 7 or Windows Server 2008 R2. See .NET Framework January 2018 Rollup Known Issue KB4074906 – “TypeInitializationException” or “FileFor.... More information will be provided here when a fix is made available."

Will follow up.