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Slow boot times and performance after installing Microsoft Windows April 2019 updates or later Microsoft monthly updates on a system with Host Intrusion Prevention
Technical Articles ID:   KB91466
Last Modified:  5/20/2019
Rated:


Environment

McAfee Host Intrusion Prevention (Host IPS) 8.0
Microsoft Windows April 2019 update KBs

For affected Microsoft Windows versions, see KB91476.

Summary

Recent updates to this article 
Date Update
May 20, 2019 Updated title to include Microsoft April update and later because of Microsoft May update release - https://support.microsoft.com/en-us/help/4499164/windows-7-update-kb4499164
April 26, 2019 Added a link to the Microsoft article with details about the fix for CSRSS included in the Windows April 2019 updates.

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Problem

The following issues might occur after you install Windows April 2019 update KBs on systems with Host IPS:
  • Slow boot up times
  • Slow performance

Cause

Changes in the Windows April 2019 update or later Microsoft monthly updates for Client Server Runtime Subsystem (CSRSS) introduced a potential deadlock with Host IPS.

Solution

If you are impacted by slow boot times after applying the Windows April 2019 update
Contact Technical Support for remediation steps and assistance. 
 
Researching the effects of applying the Windows April 2019 updates in your environment
McAfee has confirmed performance issues in some scenarios after the Windows April 2019 updates are applied where user-defined signatures that protect services are present.

To identify user-defined signatures in Host IPS in ePO
NOTE: If more than one policy is used, you must repeat these steps for each policy.
  1. Log on to the ePO console. 
  2. Open the menu and choose Policy Comparison under the Policy section. 
  3. In the Policy Comparison page, Compare Policies section:
    1. Select Host Intrusion Prevention 8.0: IPS from the Product drop-down list.
    2. Select IPS Rules (Windows, Linux Solaris) from the Category drop-down list. 
    3. In the Policy 1 drop-down list next to the Compare policies parameter, select McAfee Default Policy
    4. In the Policy 2 drop-down list next to the Compare policies parameter, select the policy used in your environment. 
    5. Select Policy Differences from the Show drop-down list. 
  4. Check if the ePO administrator has user-defined (custom) signatures. In the user-defined signatures, if Subrule 1 Parameter 1 Type is set to Services, and Subrule 1 Parameter 1 Inclusion Status is set to Include under Policy 2, it could contribute to the behavior mentioned in this article.
If no user-defined signatures are present
Currently, there have been no identified conflicts with the Windows April 2019 updates. 

If user-defined signatures are present
  • Option 1: Delay applying the Windows April 2019 updates until McAfee releases an updated build of Host IPS that addresses this conflict. The updated build of Host IPS is expected in May 2019.
  • Option 2: Disable the user-defined signatures identified by following the steps above (steps 1–4).  
    NOTE: McAfee default IPS rules have not exhibited symptoms associated with the Windows April 2019 updates. 
To contact Technical Support, log on to the ServicePortal and go to the Create a Service Request page at https://support.mcafee.com/ServicePortal/faces/serviceRequests/createSR:
  • If you are a registered user, type your User Id and Password, and then click Log In.
  • If you are not a registered user, click Register and complete the required fields. Your password and logon instructions will be emailed to you.

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