Messy September Windows and .NET patches

Windows 10 Creators Update version 1703

Cumulative Update KB 4038788, which brings the build number up to 15063.608, has two acknowledged (but not fixed) bugs:


  • Installing KB4034674 may change Czech and Arabic languages to English for Microsoft Edge and other applications.
  • After installing this update, some users may observe performance or unresponsiveness issues on the first launch of the Microsoft Edge browser. Microsoft advises: Closing and restarting Microsoft Edge will alleviate this issue.  This issue may appear periodically. Microsoft is working on a resolution and will provide an update in an upcoming release.


I’m hearing reports that 4038788 brings out all sorts of problems with Edge — it’s not just on first launch, and re-starting Edge doesn’t solve the problems.


There’s an additional bug in 4038788, which has been fixed: On some OEM systems (read: HP), Windows logon has registry keys that conflict with the app readiness service. After 5-10 minutes of black screen, users regain use of their device. This issue is triggered every time that Windows is restarted. Microsoft fixed the problem with KB 4043292, which must be downloaded and installed manually.


Windows Server 2016


When you run the Get-PhysicalDisk cmdlet, some disks may display an operational status of "In Maintenance Mode." The Get-VirtualDisk cmdlet may also display the operational status of the virtual disk as "Degraded." There’s a manual workaround described in KB 4043361.


On Windows Server 2016, when you try to download updates by using Windows Update (stand-alone or WSUS), the process hangs at 0 percent completion. Microsoft has a description of the problem and two manual overrides in KB 4039473.


.NET Framework


There was a rollup for all versions that covers a remote code execution vulnerability known as CVE-2017-8759 in addition to a handful of non-security bug fixes. For unknown reasons, Windows 10 Creators Update got the security patch but didn’t get the bug fixes.


The .NET 4.5.2 rollup installer in some versions includes some bizarre non-English prompts, like the one in the screenshot below. Microsoft assures that it’s only a glitch in the installer and not harmful.

net framework patch chinese


The .NET Security and Quality Rollups make certain custom images turn black. As Microsoft puts it: “After you install the September 12, 2017, .NET Security and Quality Rollups that apply to the .NET Framework 4.6, 4.6.1, 4.6.2, and 4.7, you experience rendering issues in Windows Presentation Foundation (WPF) applications that use WPF types in a Windows service.”


There’s a description of the problem on the Visual Studio forum and a workaround in KB 4043601. The workaround suggests that you uninstall the Security and Quality Rollup and install the Security-only patch.


Windows 7 and 8.1


There’s a well-publicized problem with Internet Explorer 11 suddenly sprouting a search box on the address bar after installing KB 4038777 (the Windows 7 Monthly Rollup) or KB 4036586 (the September Internet Explorer Security-only patch). For a detailed look at what’s happening, with screenshots, see ElderN’s post on the Microsoft Answers forum. Ends up the flim-flammery is a result of font sizes changed behind the scenes and a possible undocumented switcheroo in one of the IE settings.