April 9, 2019—KB4493472 (Monthly Rollup) – Anti-Virus known Issue

Known issues in this update


Symptom Workaround
After installing this update, some customers report that authentication fails for services that require unconstrained delegation after the Kerberos ticket expires (the default is 10 hours). For example, the SQL server service fails.

To mitigate this issue, use one of the following options:

Option 1: Purge the Kerberos tickets on the application server. After the Kerberos ticket expires, the issue will occur again, and you must purge the tickets again.

Option 2: If purging does not mitigate the issue, restart the application; for example, restart the Internet Information Services (IIS) app pool associated with the SQL server.

Option 3: Use constrained delegation.

Microsoft is working on a resolution and will provide an update in an upcoming release.
Microsoft and Sophos have identified an issue on devices with Sophos Endpoint Protection installed and managed by either Sophos Central or Sophos Enterprise Console (SEC) that may cause the system to become unresponsive upon restart after installing this update.

Microsoft has temporarily blocked devices from receiving this update if the Sophos Endpoint is installed until a solution is available. 

Guidance for Sophos Endpoint and Sophos Enterprise Console customers can be found in the Sophos support article.

Microsoft and Avira have identified an issue on devices with Avira antivirus software installed that may cause the system to become unresponsive upon restart after installing this update.

Microsoft has temporarily blocked devices from receiving this update if Avira antivirus software is installed.

We are presently investigating this issue with Avira and will provide an update when available.

Microsoft and ArcaBit have identified an issue on devices with ArcaBit antivirus software installed that may cause the system to become unresponsive upon restart after installing this update.

We are presently investigating this issue with ArcaBit and will provide an update when available.

For more information, see the Arcabit support article

Microsoft and Avast have identified an issue on devices running Avast for Business, Avast CloudCare, and AVG Business Edition antivirus software after you install this update and restart. Devices may become unresponsive at the login or Welcome screen. Additionally, you may be unable to log in or log in after an extended period of time.

Avast has released emergency updates to address this issue. For more information and AV update schedule, see the Avast support KB article.
Learn more about update KB4493472, including improvements and fixes, any known issues, and how to get the update.

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Source: https://support.microsoft.com/en-us/help/4493472/windows-7-update-kb4493472
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From: https://support.microsoft.com/app/content/api/content/feeds/sap/en-us/f825ca23-c7d1-aab8-4513-64980e1c3007/rss

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