Windows 10, version 1903 and Windows Server, version 1903

Find information on known issues and the status of the rollout for Windows 10, version 1903 and Windows Server, version 1903. Looking for a specific issue? Press CTRL + F (or Command + F if you are using a Mac) and enter your search term(s).

Current status as of November 12, 2019:   
Windows 10, version 1903 (the May 2019 Update) is designated ready for broad deployment for all users via Windows Update.

We recommend commercial customers running earlier versions of Windows 10 begin broad deployments of Windows 10, version 1903 in their organizations.

Note Follow @WindowsUpdate to find out when new content is published to the release information dashboard.

Known issues

This table offers a summary of current active issues and those issues that have been resolved in the last 30 days.

SummaryOriginating updateStatusLast updated
Issues with some older versions of Avast and AVG anti-virus products
Microsoft and Avast has identified compatibility issues with some versions of Avast and AVG Antivirus.

See details >
N/A

Mitigated External
November 25, 2019
05:25 PM PT
TLS connections might fail or timeout
Transport Layer Security (TLS) connections might fail or timeout when connecting or attempting a resumption.

See details >
OS Build 18362.418

October 08, 2019
KB4517389
Mitigated External
November 05, 2019
03:36 PM PT

Issue details

November 2019

DetailsOriginating updateStatusHistory
Issues with some older versions of Avast and AVG anti-virus products
Microsoft and Avast has identified compatibility issues with some older versions of Avast Antivirus and AVG Antivirus that might still be installed by a small number of users. Any application from Avast or AVG that contains Antivirus version 19.5.4444.567 or earlier is affected.

To safeguard your upgrade experience, we have applied a hold on devices with affected Avast and AVG Antivirus from being offered or installing Windows 10, version 1903 or Windows 10, version 1909, until the application is updated.

Affected platforms:
  • Client: Windows 10, version 1909; Windows 10, version 1903
  • Server: Windows Server, version 1909; Windows Server, version 1903
Workaround: Before updating to Windows 10, version 1903 or Windows 10, version 1909, you will need to download and install an updated version of your Avast or AVG application. Guidance for Avast and AVG customers can be found in the following support articles:
Note We recommend that you do not attempt to manually update using the Update now button or the Media Creation Tool until a new version of your Avast or AVG application has been installed and the Windows 10, version 1903 or Windows 10, version 1909 feature update has been automatically offered to you.

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N/A

Mitigated External
Last updated:
November 25, 2019
05:25 PM PT

Opened:
November 22, 2019
04:10 PM PT
TLS connections might fail or timeout
Updates for Windows released October 8, 2019 or later provide protections, tracked by CVE-2019-1318, against an attack that could allow unauthorized access to information or data within TLS connections. This type of attack is known as a man-in-the-middle exploit. Windows might fail to connect to TLS clients and servers that do not support Extended Master Secret for resumption (RFC 7627). Lack of RFC support might cause one or more of the following errors or logged events:
  • "The request was aborted: Could not create SSL/TLS secure Channel"
  • SCHANNEL event 36887 is logged in the System event log with the description, "A fatal alert was received from the remote endpoint. The TLS protocol defined fatal alert code is 20.​"
Affected platforms:
  • Client: Windows 10, version 1903; Windows 10, version 1809; Windows 10 Enterprise LTSC 2019; Windows 10, version 1803; Windows 10, version 1709; Windows 10, version 1703; Windows 10 Enterprise LTSC 2016; Windows 10, version 1607; Windows 10 Enterprise LTSC 2015; Windows 8.1; Windows 7 SP1
  • Server: Windows Server, version 1903; Windows Server, version 1809; Windows Server 2019; Windows Server, version 1803; Windows Server, version 1709 ; Windows Server 2016; Windows Server 2012 R2; Windows Server 2012; Windows Server 2008 R2 SP1; Windows Server 2008 SP2

Next Steps: Connections between two devices running any supported version of Windows should not have this issue when fully updated. There is no update for Windows needed for this issue. These changes are required to address a security issue and security compliance. For information, see KB4528489.

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OS Build 18362.418

October 08, 2019
KB4517389
Mitigated External
Last updated:
November 05, 2019
03:36 PM PT

Opened:
November 05, 2019
03:36 PM PT