Windows 7/8.1 Preview Rollups October 2017

Windows Update[German]Microsoft has released on October 17, 2017 Monthly Preview Rollups KB4041686 for Windows 7 and KB4041685 for Windows 8.1 (and the Server pendants). Here are a few details.


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Update KB4041686 for Windows 7

Update KB4041686 (Preview of Monthly Rollup for Windows 7 SP1 and Windows Server 2008 R2 SP1) contains improvements and fixes from monthly rollup KB4041681 October 10, 2017 and the following improvements:

  • Addressed issue with the Universal CRT where _stat32i64() returns an incorrect drive number (error 0xFFFFFFFF) when using a relative path.
  • Addressed issue in the Universal CRT where incorrect characters were returned when the tolower() function was called.
  • Addressed issue where the Universal CRT _splitpath() function was not handling multibyte strings correctly, which caused apps to fail when accessing multibyte filenames.
  • Addressed issue where the Universal CRT caused linker (link.exe) to stop working for large projects.
  • Addressed issue where USBHUB.SYS randomly causes memory corruption that results in random system crashes that are extremely difficult to diagnose.

Microsoft mentioned the following issues with this update:

  • After installing KB4041686, package users may see an error dialog that indicates that an application exception has occurred when closing some applications. This can affect applications that use mshtml.dll to load web content. The failure only occurs when a process is already shutting down and doesn’t impact application functionality.
  • Installing this update may cause applications based on the Microsoft JET Database Engine (Microsoft Access 2007 and older or non-Microsoft applications) to fail when creating or opening Microsoft Excel .xls files. The error message is, “Unexpected error from external database driver (1). (Microsoft JET Database Engine)”.

Microsoft is working on these issues and will provide a fix with the upcoming releases. For the Microsoft JET Database Engine bug, Microsoft proposes, to download and install Microsoft Access Database Engine 2010 Redistributable. The the DB connection string in Microsoft Excel has to be modified, that the ACE provider is used. Change the string Provider=Microsoft.Jet.OLEDB.4.0 to Provider=Microsoft.ACE.OLEDB.12.0 for instance.

This update is optional and I don’t recommend to install it.

Update KB4041685 for Windows 8.1

Update KB4041685 (Preview of Monthly Rollup for Windows 8.1 and Windows Server 2012 R2) contains improvements and fixes from monthly rollup KB4041693 October 10, 2017 and the following improvements:


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  • Addressed memory leak issue in combase that occurs while converting Rich Text to Unicode.
  • Addressed issue in which using smart card authentication to connect RDP to the Windows 2012 RDS server fails intermittently. The issue is related to a timing problem in the LogonUI process. It is most common when clients use virtual smart cards.
  • Addressed issue that affects the Universal CRT in which _stat32i64() returns an incorrect drive number (error 0xFFFFFFFF) when using a relative path.
  • Addressed issue in the Universal CRT in which incorrect characters were returned when the tolower() function was called.
  • Addressed issue in which the Universal CRT _splitpath() function was not handling multibyte strings correctly. This caused apps to fail when accessing multibyte filenames.
  • Addressed issue in which the Universal CRT caused linker (link.exe) to stop working for large projects.
  • Addressed issue in which the MSMQ performance counter (MSMQ Queue) may not populate queue instances when the server hosts a clustered MSMQ role.
  • Addressed issue in which AD FS can no longer ignore “prompt=login” during authentication. A “Disabled” option was added to support scenarios in which password authentication is not used. For more information, see AD FS ignores the “prompt=login” parameter during an authentication in Windows Server 2012 R2.
  • Addressed issue in AD FS in which MSISCookies in request headers could eventually overflow the headers size limit. This caused a failure to authenticate and return HTTP status code 400: “Bad Request – Header Too Long.”
  • Addressed issue in which adding user rights to an RMS template caused the Active Directory RMS management console (mmc.exe) to stop working and return an unexpected exception.
  • Addressed issue in which USBHUB.SYS randomly caused memory corruption that caused random system crashes that are extremely difficult to diagnose.

Also this update has the two bugs described above within the Windows 7 Update section. A 3rd bug is described as: Some users who have the text size for icons set to a larger size (using Display Settings in Control Panel) may have issues starting Internet Explorer.

Microsoft recommends, to reduce the text size for icons to a smaller value or use the Change the size of all items setting. Microsoft is working on a resolution and will provide an update in an upcoming release. This update is optional and I don’t recommend to install it.

Similar articles:
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Adobe Flash Update 27.0.0.159 (October 2017)
Microsoft Security Updates Summary October 2017
Windows 10 Updates (October 10, 2017)
Microsoft Office Security Updates (October 10, 2017)
Windows 10: Updates KB4041688, KB4043961 (10/17/2017)
Windows 7/8.1 Preview Rollups October 2017
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