KB4537818

• Updates an issue that prevents the speech application from opening for several minutes in a high noise environment.

• Improves the accuracy of Windows Hello face authentication.

• Updates an issue that might prevent ActiveX content from loading.

• Improves the battery performance during Modern Standby mode.

• Updates an issue that prevents you from taking a screenshot of a window.

• Updates an issue that adds an unwanted keyboard layout as the default after an upgrade even if you have already removed it.

• Updates an issue that prevents users from reactivating their copy of Windows using the product key stored in their Managed Service Account (MSA).

• Updates an issue that prevents some applications from printing to network printers.

• Addresses an issue that prevents the speech platform application from opening for several minutes in a high noise environment.

• Improves the accuracy of Windows Hello face authentication.

• Improves Urlmon resiliency when receiving incorrect Content-Length for a PeerDist response.

• Addresses an issue that might prevent ActiveX content from loading.

• Addresses an issue that might cause Microsoft browsers to bypass proxy servers.

• Improves the battery performance during Modern Standby mode.

• Addresses an issue that causes the power dependency coordinator (PDC) driver to unnecessarily drain the battery in certain scenarios.

• Addresses an issue that prevents a user from upgrading or uninstalling some Universal Windows Platforms (UWP) apps in certain scenarios.

• Addresses an issue that causes attempts to take a screenshot of a window using the PrintWindow API to fail.

• Addresses an issue that adds an unwanted keyboard layout as the default after an upgrade or migration even if you have already removed it.

• Addresses an issue that fails to return search results in the Start menu Search box for users that have no local profile.

• Addresses an issue that causes the installation process to stop when installing Windows on a VMware guest machine that has a USB 3.0 hub attached.

• Addresses an issue in which re-running PowerShell workflows might fail with compilation errors for long sessions.

• Improves Event Forwarding scalability to ensure thread safety and increase resources.

• Addresses an issue in the Windows activation troubleshooter that prevents users from reactivating their copy of Windows using the product key stored in their Managed Service Account (MSA).

• Addresses an issue that generates an “unknown username or bad password” error when attempting to sign in. This occurs in an environment that has a Windows Server 2003 domain controller (DC) and a Windows Server 2016 or later DC.

• Addresses an issue with sign in scripts that fail to run when a user signs in or signs out.

• Addresses an issue that continues to collect IsTouchCapable and GetSystemSku data when they should no longer be collected.

• Provides live response capability that gives Security Operations (SecOps) immediate access to compromised machines using the Microsoft Defender Advanced Threat Protection (ATP) console (Microsoft Defender Security Center).

• Improves the accuracy of detection in Microsoft Defender ATP Threat & Vulnerability Management.

• Improves application compatibility with Microsoft Defender ATP.

• Addresses an issue that might cause Direct Access servers to use a large amount of non-paged pool memory (pooltag: NDnd).

• Addresses an issue that prevents some applications from printing to network printers.

• Addresses an issue that causes the wrong printer name to be selected when you click the Print button in the SQL reporting service.

• Addresses an issue that might cause a printer to be a hidden device in Device Manager after a restart.

• Addresses an issue that prevents the Background Intelligent Transfer Service (BITS) from downloading files; the error is “0x80190191.”

• Addresses an issue that causes the Windows firewall to drop network traffic from Modern apps, such as Microsoft Edge, when you connect to a corporate network using a virtual private network (VPN).

• Addresses an issue that causes Host Networking Service (HNS) PortMapping policies to leak when the container host is reinstated after a restart.

• Addresses an issue that causes some systems to stop responding when operating embedded MultiMediaCard (eMMC) storage devices.

• Addresses an issue that occurs when you try to sign in to Windows during recovery mode. The error, "No administrator accounts are available on this machine", appears.

• Addresses an issue that prevents you from removing some local users from local built-in groups. For example, you cannot remove "Guest" from the "Guests" local group.

• Addresses an issue that causes the Local Security Authority Subsystem Service (LSASS) to stop working and triggers a restart of the system. This issue occurs when invalid restart data is sent with a non-critical paged search control.

• Addresses an Open Database Connectivity (ODBC) issue that causes an infinite loop in the retry logic when there are several lost connections in the connection pool.

• Addresses an issue that causes queries against large keys on Ntds.dit to fail with the error, “MAPI_E_NOT_ENOUGH_RESOURCES.” This issue might cause users to see limited meeting room availability because the Exchange Messaging Application Programming Interface (MAPI) cannot allocate additional memory for the meeting requests.

• Addresses an issue that intermittently generates Online Certificate Status Protocol (OSCP) Responder audit events (5125) to indicate that a request was submitted to the OCSP Responder Service. However, there is no reference to the serial number or the domain name (DN) of the issuer of the request.

• Addresses an issue that prevents Server Message Block (SMB) Multichannel from working within a cluster network that has IPv6 Local-Link addresses.

• Addresses an issue that might cause Storage Migration Service inventory operations on a Windows Server 2003 source computer to fail in clustered environments.

• Addresses an issue in which canceling a deduplication (dedup) job to rebuild hotspots prevents other deduplication PowerShell commands from responding.

• Addresses an issue that causes window ordering to fail after displaying tooltips in the RemoteApp window.

• Addresses an issue in which the Remote Desktop (RD) Licensing Diagnoser shows an incorrect version of the Remote Desktop Session Host (RDSH) and the Remote Desktop Licensing Server (RDLS).

• Addresses an issue with certificate validation that causes Internet Explorer mode in Microsoft Edge to fail.

• Addresses an issue related to a high performance power scheme.