Workaround for KB4088875 & KB4088878

Microsoft yet again fucked up big time here. Two updates KB4088875 & KB4088878 causing a lot of drama and the Windows community is totally upset about this, what happened? Those two updates affecting Windows 7 and Windows Server 2008 R2 system which after installing the update having problems to obtain a valid IP address on virtual networks products such as VMware.

Windows 7 VMWare

The Problem

After installing the two updates KB4088875 & KB4088878 Windows 7 and Windows Server 2008 R2 users reported that there can’t obtain an valid IP address on the virtual host system anymore. This issue not only affects VMware exclusive products it also affects other products but it first was discovered by VMWare users – which is no surprise because the program is used by millions of people around the globe.

The updates replacing the existent network adapters (vNIC’s) without that the existent IP configuration are been saved, it basically resets it to the defaults. To name one example, if you’re using the VMwares ESXi product the IP information/configuration for the  VMXNET3 adapter gets automatically a reset after you installed the updates,

Two Workarounds

Microsoft & VMware confirmed the issue and there providing two workarounds in order to solve the problem.

  1. VMware shows what possibilities you have in order to fix the issue. That said VMWare said it’s a Windows related issue and needs to be fixed on Microsoft side.
  2. You can use the VBS-Script mentioned here, just copy it and replace the .txt extension with .vbs. I suggest you backup the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\PCI key first before you apply the script in case you have to revert the configuration back. Shit happens!

Final Words

The problem is definitely on Microsoft’s side and VMWare can’t provide a patch here, so you’re depending once again that Microsoft removes the update(s) and replace it with a corrected version in the coming weeks. It’s frustrating that such things happen but it’s not a big deal with those two given workarounds, on the other sides uninstalling the KB’s is in this case pointless because once the ‘damage’ is done you have to apply one of the mentioned workarounds which is big waste of time and I totally understand in this case that people are upset. ermm

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