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This update addresses the following issues that were introduced inKB4088875 and KB4088878for Windows 7 Service Pack 1 (SP1) and Windows Server 2008 R2 SP1:

A new Ethernet Network Interface Card (NIC) that has default settings may replace the previous NIC and cause network issues.

  • Static IP address setting are lost.

  • These symptoms may occur on both physical computers and virtual machine that are running VMWare.

Known issues

Microsoft is not aware of any issues that affect this update currently.

How to get this update

This update is now available for installation through WSUS.  

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

More information


  • This update must be installed before you install KB4088875 or KB4088878.

  • If you have previously installed KB4099950 prior to April 17, 2018 please uninstall the older version of KB4099950 and reinstall to assure you have the most recent version.


Learn about theterminology that Microsoft uses to describe software updates

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