Microsoft (finally!) acknowledges a bug in Win7 virtual machines after installing the January Monthly Rollup KB 4480963 or Security-only KB 4480964

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Shout-out to Lounger Freeco, who first notified us of the bug almost two weeks ago. The KB articles now say: After installing this update, virtual mac
[See the full post at: Microsoft (finally!) acknowledges a bug in Win7 virtual machines after installing the January Monthly Rollup KB 4480963 or Security-only KB 4480964]

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PhotM, Elly

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Interesting…. the January 2019 updates had an AMD-specific vulnerability fix for Spectre.  But this VM problem only affects AMD’s mobile and tablet CPUs on older versions of Windows.

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So this is not the year old VN NIC bug, is it?

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problem not fixed in new KB4486563 Win7 rollup and the rollups for Win8/8.1.

also it is not only a Win7 problem but also occurs under Win8 embedded/Server 2012 and Win8.1/Server 2012 R2 as well.

see

https://support.microsoft.com/en-us/help/4480975
https://support.microsoft.com/en-us/help/4480968

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wEarwOlf505cole, RMeijer, abbodi86

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The number of people using Windows Server + Hyper-V on an AMD mobile chip is probably very, very small.

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it’s not only for AMD mobile CPU’s.

We have this on Dell R715 hosts with AMD Opteron 6376 CPU’s.
Yes they’re old… So in that respect, yes, I don’t expect many people will face this issue.

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mid-February 2019 means the upcoming Preview Monthly Rollups

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FWIW, KB4480964 isn’t for Win7.

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Absolutely correct… it is Win 8.1 Security-only… and also has the same bug.

Non-techy Win 10 Pro and Linux Mint experimenter

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