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The info in the log file produced by KB 4099950 is probably correct info for the time that that instance of KB 4099950 was installed by you. Later, you probably installed KB4093118 and rebooted, after which the pci.sys version should be newer.

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KarenS

“For many (most?) people, running the latest (or any) version of KB4099950 seems to have updated their pci.sys file version to .21744 or above.”

I believe that this is an urban legend.

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jburk07

You probably ran the instance of KB4099950 that produced that log file before you installed KB4093118 and rebooted.

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KarenS

“I have a Reddit account. What would you like to ask?”

Any questions that you or other AskWoody users want answered :).

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woody

If anyone’s interested in testing and has VMware, here are some purported methods to create this issue: https://blog.scottlowe.org/2011/11/25/problem-with-vmxnet3-driver/.

I found another good technical reference: Improved iSCSI Boot Resiliency with changes to Plug and Play behavior in Microsoft KB2344941.

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woody

Is there anyone with a Reddit account (or willing to make one) willing to ask netwarrior20 questions at Reddit?

@ch100: Thank you for your post :).

“Why Microsoft decided to address it now with a widely distributed patch remains a mystery.”

It seems that Microsoft released a new version of pci.sys in the March 2018 updates because there was an undocumented fix for another issue involving pci.sys (reference).

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woody, ch100

Perhaps related to this Reddit discussion. Reddit user netwarrior20 is purportedly a Microsoft Escalation Engineer assigned to this issue.

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HiFlyer, ch100, geekdom, abbodi86

Reddit user netwarrior20 is purportedly a Microsoft Escalation Engineer assigned to this issue. Here are netwarrior20’s comments at Reddit: https://www.reddit.com/user/netwarrior20/comments/.

Agreed :).

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SueW

Anyone care to speculate why Microsoft put version checks for pci.sys in KB4099950?

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HiFlyer, geekdom, jburk07

Now there are 65,661 articles.

“PKCano helped me with trying to get KB 4099950 installed but it never did update the PCI.sys file.”

I’m not aware that KB 4099950 can update file pci.sys.

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jburk07

‘I’m still seeing complaints about “The User Profile Service failed the logon” bugs, but MS has addressed that problem here.’

That’s not a new update. As of around January 1, 2018, the article https://support.microsoft.com/en-us/help/947215/you-receive-a-the-user-profile-service-failed-the-logon-error-message had been last updated on April 21, 2017.