Related topics
Sign in with Microsoft
Sign in or create an account.
Select a different account.
You have multiple accounts
Choose the account you want to sign in with.

Release Date:



OS Build 14393.1532

Improvements and fixes

This update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

  • Addressed issue with a port and thread leak that can cause a broad array of symptoms including unresponsive systems and iSCSI target connection failures. This occurs after installing monthly updates released between April 11, 2017 (KB4015217) through July 11, 2017 (KB4025339). This issue was called out as known issue in the corresponding release notes for these updates.

  • Addressed issue where faulty silicon in Solid-State Drives impacted the performance of the Microsoft Standard NVM Express Driver (stornvme). 

  • Addressed issue where the Windows NVDIMM driver will attempt to dismount any volumes on the device and transition into a read-only state when NVDIMM devices lose persistence.

  • Addressed issue where WinRM reports an unnecessary error in the event log (ID 10119) after a clean OS installation.

  • Addressed issue where when you use SCVMM to manage virtual servers, if any CSV is offline, SCVMM cannot enumerate or locate the CSVs on the clusters.

  • Addressed issue where when you switch from a wired connection to a wireless connection, a file (.ppt, .xls, etc.) that is being edited gets marked as “Read-Only”.

  • Addressed issue where when you enable deduplication on a volume larger than 10 TB, optimization may stop prematurely and never complete.

  • Addressed issue where when you use folder redirection with only defined primary computers, folder redirection is enabled for all users on all machines.

  • Addressed issue where you cannot add Work and School accounts in Microsoft Store and you may get an error that reads, “We encountered an error; please try signing in again later.”

  • Addressed an issue where Windows Multipoint Server (WMS) 2016 does not allow you to configure per device licensing.

  • Addressed issue in Windows Multipoint Server 2012 where DisplayToast() fails when using a custom shell.

  • Addressed issue where File Explorer does not refresh changes automatically when using RemoteApps on Windows Server 2016.

  • Addressed issue where I/O recursion caused Unified Write Filter to deadlock.

  • Addressed issue where a BT LE device is not enumerated correctly, which throws an error in the Device Manager.

  • Addresses issue where an LDAP search evaluating transitivity on a large number of objects uses an excessive amount of memory. An example of such a search is with a filter of memberof:1.2.840.113556.1.4.1941:=cn=GroupA,Ou=Accounts,DC=Contoso,DC=Com and a scope of subtree.

  • Addressed issue where launching a published application using an application server system fails intermittently. Additionally, logonui.exe crashes during the process.

  • Addressed a reliability issue where inserting into the IncomingDependencies list without acquiring LoaderLock resulted in an unresponsive system.

  • Addressed issue where the "Removable Storage Access > Deny write access" policy was not honored.

  • Addressed issue where a task’s repeat trigger stopped working after reboot.

  • Addressed issue where users could not update spooler settings for an hour after restarting it.

  • Addressed issue where the combination of Unified Write Filter and a legacy driver might cause Point-of-Sale devices to deadlock.

  • Addressed issue where a LUN connection that was received after the buffer allocation during iSCSI statistic collection overflowed the buffer and caused error 0x19. A UI issue that hides the iSCSI targets will be addressed in an upcoming release.

  • Addressed issue where an MPIO path failure on a Hyper-V host might lead to complete loss of disk access.

  • Addressed issue where a missing break statement might cause an MPIO LUN to be unexpectedly removed.

  • Addressed issue where NTFS referenced an invalid parameter when using Task Scheduler, resulting in Stop Error 0x24.

  • Addressed issue where the system would throw an error when attempting to mount a corrupt ReFS volume in Read-Only mode.

  • Addressed performance issues in ReFS when backing up many terabytes of data.

  • Addressed issue where a stuck thread in ReFS might cause memory corruption.

  • Addressed issue where the health of S2D clusters was inconsistently reported.

  • Addressed issue where frequent loading and unloading when Unified Write Filter is enabled might cause a system crash.

  • Addressed issue where touch screen and fingerprint swiping stopped working when multiple users were logged in.

  • Addressed issue where tasks launched for a service user with a stored password fail with ERROR_LOGON_FAILURE.

  • Addressed issue by changing the handling of certificate replacement from a separate “remove” -> “add” calls to a single atomic “update” call.

  • Addressed issue where UWF couldn't take updates through Windows Update due to a registry category mismatch.

  • Addressed issue that requires the addition of a new client-side Group Policy that optionally disables Dual Scan behavior.

  • Addressed issue where the PkeyAuth token handler may fail an authentication if the PkeyAuth request contains incorrect data. The authentication should still continue without performing device authentication.

  • Added new server variables to IIS to capture SSL/TLS protocol and cipher suite algorithms used with each request. Additionally, we enabled IIS Enhanced Logging to log this information.

If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.

Known issues in this update

Microsoft is not currently aware of any issues with this update.

How to get this update

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

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4025334

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Was this information helpful?

What affected your experience?

Thank you for your feedback!