Microsoft has released a Windows 10 update that fixes several bugs in Windows 10, version 1909 and Windows 10, version 1903, including an issue that causes Windows Update to stop responding and the lock screen to stop appearing.
The optional non-security update KB4550945 was released as part of the optional Monthly Rollup “C” and comes with quality improvements to Windows 10.
More information about the different types of monthly quality updates released by Microsoft each month is available here .
Additional information about optional updates from May 2020 can be found in a Windows about the schedule for upcoming optional Windows builds C and D.
KB4550945 will be installed automatically when checking for updates using Windows Update, and you can also install it manually from the Microsoft Update Catalog.
Full list of changes in KB4550945
- Addresses an issue that prevents some applications from opening after upgrading from a previous version of Windows and a Bad Image exception dialog box appears.
- Addresses an issue that disables notifications for devices using a virtual private network (VPN) over a cellular network.
- Addresses an issue that prevents you from continuing a Microsoft Xbox game on a Windows device after upgrading from a previous version of Windows.
- Addresses an issue that causes a frame containing multiple lines of text to stop responding in certain scenarios.
- Addresses an issue that prevents the touch keyboard from appearing during login when the user is prompted for the password.
- Addresses an issue that prevents the touch keyboard from opening in Universal Windows Platform (UWP) apps when USB.
- Addresses an issue that displays incorrect folder properties in File Explorer when the path is greater than MAX_PATH.
- Addresses an issue that prevents the correct lock screen from appearing when all of the following are true:
- The GPO policy “Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Interactive Logon: Do not require Ctrl+Alt+Del Computer” is disabled.
- The GPO policy “Computer Configuration\Administrative Templates\System\Logon\Turn off app notifications on the lock screen” is enabled.
- The registry key HKLM\SOFTWARE\Policies\Microsoft\Windows\System\DisableLogonBackgroundImage is set to 1.
- Addresses an issue that generates unexpected notifications related to changing default application.
- Addresses an issue that causes the login screen to be blurry.
- Addresses an issue that causes Windows Update to stop responding when checking for updates.
- Addresses an issue that prevents the Sign in options page from opening using the ms:signinoptions-launchfingerprintenrollment Uniform Resource Identifier (URI) settings.
- Addresses an issue with Bluetooth Group Policy settings on Microsoft Surface Pro X devices
- Addresses an issue that causes a KERNEL_SECURITY_CHECK_FAILURE (139) Stop error when Windows resumes from sleep and turns on certain Bluetooth.
- Addresses a reliability issue in WDF01000.sys.
- Addresses an issue that causes an error in logman.exe. The error is, “A user account is required to bind the current Data collector Set properties.”
- Addresses an issue that prevents users from setting REG_EXPAND_SZ keys in certain automated scripts.
- Addresses an issue that causes a memory leak in the LsaIso.exe process when the server is under a heavy authentication load and Credential Guard is enabled.
- Addresses an issue that causes the Trusted Platform Module (TPM) to fail to initialize with system event error 14 and prevents Windows from accessing the TPM.
- Addresses an issue that causes a timeout and communication failure with the TPM.
- Addresses an issue that prevents hash signing using the Microsoft Platform Crypto Provider for TPM from working correctly. This issue may also affect networking software, such as VPN applications.
- Addresses an issue that prevents applications running in an Azure Active Directory environment from receiving account change notifications. This occurs when using the Web Account Manager (WAM) and WebAccountMonitor API.
- Addresses an issue that causes systems to crash with a stop code of 0x3B when running a binary that is signed by a revoked certificate.
