KB4519978

Updates an issue that might display a black screen at startup during the first sign in after installing an update.

Updates an issue with Bluetooth when using certain audio profiles for extended periods.

Updates an issue that causes a system to stop working during the Windows upgrade process.

Updates an issue that may prevent a scroll bar from being selected in Internet Explorer.

Updates an issue with the Windows Mixed Reality Portal that might report that your headset is sleeping and it might not wake up.

Addresses an issue that causes printing from 32-bit applications to fail with an “Access is denied” error when you select Run as different user for the application.

Addresses an issue that sometimes causes the Resilient File System (ReFS) to stop working.

Addresses an issue with evaluating the compatibility status of the Windows ecosystem to help ensure application and device compatibility for all updates to Windows.

Addresses an issue with a race condition between the volume mount process (within fileinfo.sys) and the deregistration of filter notifications that causes the operating system to stop working on certain virtual machines. The error code is “0x7E.”

Addresses an issue with the Windows Mixed Reality Portal that might intermittently generate a “15-5” error. In some cases, Windows Mixed Reality Portal might report that the headset is sleeping and selecting the Wake up button might appear to produce no response.

Facilitates the configuration of devices that are managed by mobile device management (MDM) settings, which are created by ADMX ingestion. You can update a previously ingested ADMX file with a newer version, and you are not required to delete the previous ADMX file. This solution applies to all applications that use ADMX ingestion.