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). Want the latest Windows release health updates? Follow @WindowsUpdate on Twitter.

Current status as of May 27, 2020:   
Windows 10, version 1903 (the May 2019 Update) is designated ready for broad deployment for all users via Windows Update.
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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
Unable to access internet when using certain WWAN LTE modems
Internet might show as connected but be unreachable when using certain WWAN LTE modems.

See details >
OS Build 18362.693

February 27, 2020
KB4535996
Resolved
KB4559004
July 21, 2020
02:00 PM PT
Outlook closes unexpectedly or you might receive an error when attempting to open
An example of an error you might receive is, "Outlook couldn't start last time."

See details >
OS Build 18362.959

July 14, 2020
KB4565483
Resolved
July 15, 2020
03:43 PM PT
Local Security Authority Subsystem Service (lsass.exe) might fail on some devices
Affected devices might receive a critical system process error and the device might restart.

See details >
OS Build 18362.836

May 12, 2020
KB4556799
Resolved
KB4565483
July 14, 2020
10:00 AM PT
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

Resolved External
July 14, 2020
10:19 AM 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
Resolved External
July 14, 2020
10:19 AM PT
Social media reports related to issues with KB4549951
Reported issues include Bluetooth, stop error with blue screen and other related issues.

See details >
OS Build 18362.778

April 14, 2020
KB4549951
Resolved
July 14, 2020
10:19 AM PT
“Reset this PC” feature might fail
“Reset this PC” feature is also called “Push Button Reset” or PBR.

See details >
N/A
February 11, 2020
KB4524244
Mitigated
February 15, 2020
01:22 AM PT
You might encounter issues with KB4524244
You might encounter issues trying to install or after installing KB4524244

See details >
N/A
February 11, 2020
KB4524244
Mitigated
February 15, 2020
01:22 AM PT

Issue details

July 2020

DetailsOriginating updateStatusHistory
Outlook closes unexpectedly or you might receive an error when attempting to open
Microsoft Outlook might close unexpectedly or you might receive an error when attempting to open the app. An example of an error you might receive is, "Outlook couldn't start last time. Safe mode could help you troubleshoot the problem, but some features might not be available in this mode. Do you want to start in Safe Mode?" You might also see an event in the Event Viewer, as listed in the article linked below.

Affected platforms:
  • Client: Windows 10, version 2004; Windows 10, version 1909; Windows 10, version 1903; Windows 10, version 1809; Windows 10 Enterprise LTSC 2019; Windows 10, version 1803; Windows 10, version 1709; Windows 10, version 1607; Windows 10 Enterprise 2015 LTSB; Windows 8.1; Windows 7 SP1
Workaround: As an alternative, on your Windows 10 device you can use the Office365 on the web (OWA), also known as webmail. Outlook mobile is also unaffected. There is no workaround for this issue for the Outlook app on Windows 10 until the resolution is deployed to your device. We do not recommend using the command to revert to an earlier version.

Resolution: This Outlook issue has been resolved and will be deployed automatically to your device. This issue was not related to any update for Windows and no update for Windows is needed. We expect this issue to be completely resolved for all affected users by July 15, 2020 at 3:30 PM PST (10:30 PM UTC). You may also need to attempt to open Outlook a few times before it will be fully refreshed and open as expected. For more information, please see the support article, Active Investigation into Outlook Crashing on Launch and this twitter thread.

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OS Build 18362.959

July 14, 2020
KB4565483
Resolved
Resolved:
July 15, 2020
03:43 PM PT

Opened:
July 15, 2020
03:22 PM PT

June 2020

DetailsOriginating updateStatusHistory
Local Security Authority Subsystem Service (lsass.exe) might fail on some devices
The Local Security Authority Subsystem Service file (lsass.exe) might fail on some devices with the error message, “A critical system process, C:\WINDOWS\system32\lsass.exe, failed with status code c0000008. The machine must now be restarted."

Affected platforms:
  • Client: Windows 10, version 2004; Windows 10, version 1909; Windows 10, version 1903; Windows 10, version 1809; Windows 10 Enterprise LTSC 2019
  • Server: Windows Server, version 2004; Windows Server, version 1909; Windows Server, version 1903; Windows Server, version 1809; Windows Server 2019
Resolution: This issue was resolved in KB4565483.

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OS Build 18362.836

May 12, 2020
KB4556799
Resolved
KB4565483
Resolved:
July 14, 2020
10:00 AM PT

Opened:
June 24, 2020
12:46 PM PT

May 2020

DetailsOriginating updateStatusHistory
Unable to access internet when using certain WWAN LTE modems
After installing KB4535996 on a Windows 10 device with a wireless wide area network (WWAN) LTE modems, you might be unable to reach the internet even though the Network Connectivity Status Indicator (NCSI) in the notification area shows as connected to the internet.

Affected platforms:
  • Client: Windows 10, version 1909; Windows 10, version 1903
  • Server: Windows Server, version 1909; Windows Server, version 1903
Resolution: This issue was resolved in KB4559004.

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OS Build 18362.693

February 27, 2020
KB4535996
Resolved
KB4559004
Resolved:
July 21, 2020
02:00 PM PT

Opened:
May 22, 2020
12:47 PM PT

April 2020

DetailsOriginating updateStatusHistory
Social media reports related to issues with KB4549951
We have seen social media reports related to KB4549951 that mention Bluetooth, stop error with blue screen and other related issues.

Affected platforms:
  • Client: Windows 10, version 1909; Windows 10, version 1903
  • Server: None
Resolution: To date, we have not seen these issues reflected in telemetry, support data or customer feedback channels. We continuously investigate all customer feedback and are closely monitoring this situation. Note If you experience any issues we'd like to know. Please provide feedback using the keyboard shortcut Windows + F or go to the Start menu and select Feedback Hub so that we can investigate.

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OS Build 18362.778

April 14, 2020
KB4549951
Resolved
Resolved:
July 14, 2020
10:19 AM PT

Opened:
April 24, 2020
12:47 PM PT

February 2020

DetailsOriginating updateStatusHistory
“Reset this PC” feature might fail
Using the “Reset this PC” feature, also called “Push Button Reset” or PBR, might fail. You might restart into recovery with “Choose an option” at the top of the screen with various options or you might restart to your desktop and receive the error “There was a problem resetting your PC”.

Affected platforms:
  • Client: Windows 10, version 1909; Windows 10, version 1903; Windows 10, version 1809; Windows 10 Enterprise LTSC 2019; Windows 10, version 1803; Windows 10, version 1709; Windows 10 Enterprise LTSC 2016; Windows 10, version 1607
  • Server: Windows Server, version 1909; Windows Server, version 1903; Windows Server, version 1809; Windows Server 2019; Windows Server, version 1803; Windows Server, version 1709 ; Windows Server 2016
Workaround: The standalone security update, KB4524244 has been removed and will not re-offered from Windows Update, Windows Server Update Services (WSUS) or Microsoft Update Catalog. Note This does not affect any other update, including Latest Cumulative Update (LCU), Monthly Rollup or Security Only update.

If you have installed this update and are experiencing this issue, the following steps should allow you to reset your device:
  1. Select the start button or Windows Desktop Search and type update history and select View your Update history.
  2. On the Settings/View update history dialog window, Select Uninstall Updates.
  3. On the Installed Updates dialog window, find and select KB4524244 and select the Uninstall button.
  4. Restart your device.
  5. Upon restart use the “Reset this PC” feature and you should not encounter this issue.

Next steps: We are working on an improved version of this update in coordination with our partners and will release it in a future update.

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N/A
February 11, 2020
KB4524244
Mitigated
Last updated:
February 15, 2020
01:22 AM PT

Opened:
February 15, 2020
12:02 AM PT
You might encounter issues with KB4524244
You might encounter issues trying to install or after installing KB4524244.

Affected platforms:
  • Client: Windows 10, version 1909; Windows 10, version 1903; Windows 10, version 1809; Windows 10 Enterprise LTSC 2019; Windows 10, version 1803; Windows 10, version 1709; Windows 10 Enterprise LTSC 2016; Windows 10, version 1607; Windows 10 Enterprise LTSC 2015; Windows 8.1
  • Server: Windows Server, version 1909; 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
Workaround: To help a sub-set of affected devices, the standalone security update (KB4524244) has been removed and will not re-offered from Windows Update, Windows Server Update Services (WSUS) or Microsoft Update Catalog. Note This does not affect any other update, including Latest Cumulative Updates (LCUs), Monthly Rollups or Security Only updates.

If this update is installed and you are experiencing issues, you can uninstall this update.
  1. Select the start button or Windows Desktop Search and type update history and select View your Update history.
  2. On the Settings/View update history dialog window, Select Uninstall Updates.
  3. On the Installed Updates dialog window, find and select KB4524244 and select the Uninstall button.
  4. Restart your device.
 
Next steps: We are working on an improved version of this update in coordination with our partners and will release it in a future update.

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N/A
February 11, 2020
KB4524244
Mitigated
Last updated:
February 15, 2020
01:22 AM PT

Opened:
February 15, 2020
12:02 AM PT

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:
Resolution: This issue has been resolved and the safeguard hold has been removed. Please note, if there are no other safeguards that affect your device, it can take up to 48 hours before the update to Windows 10, version 2004 is offered. Note The affected incompatible versions of Avast Antivirus and AVG Antivirus might not be installed after updating to a later version of Windows 10.

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N/A

Resolved External
Last updated:
July 14, 2020
10:19 AM 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

Resolution: 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
Resolved External
Last updated:
July 14, 2020
10:19 AM PT

Opened:
November 05, 2019
03:36 PM PT