Windows 10: Windows Defender Real-Time Protection is making my SMB Share slow

Discus and support Windows Defender Real-Time Protection is making my SMB Share slow in AntiVirus, Firewalls and System Security to solve the problem; Hi, I use some file shares with many pictures. When I try to open those folder is takes forever to load previews of these pictures. When I disable... Discussion in 'AntiVirus, Firewalls and System Security' started by FerronN, Apr 16, 2020.

  1. FerronN Win User

    Windows Defender Real-Time Protection is making my SMB Share slow


    Hi,


    I use some file shares with many pictures. When I try to open those folder is takes forever to load previews of these pictures.

    When I disable Real-Time protection everything goes well. I did not find a way to exclude this picture location from Real-Time Protection.

    Does anyone know how to do this?

    :)
     
    FerronN, Apr 16, 2020
    #1

  2. Untable to Control Windows Defender Real-time Protection On/Off

    Sometimes, we need to turn off Windows Defender Real-time protection. In my experience, this software may cause some error to run Android Emulator such as BigNox. It also slowing down my Android Studio. To disable Windows Defender Real-time protection, I
    do these steps:

    1. Run Windows PowerShell as administrator
    2. execute set-mppreference -DisableRealtimeMonitoring 1
    Windows PowerShell

    Copyright (C) Microsoft Corporation. All rights reserved.

    PS C:\WINDOWS\system32> set-mppreference -DisableRealtimeMonitoring 1

    PS C:\WINDOWS\system32>

    In Windows registry it will create

    Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\Real-Time Protection -> DisableRealtimeMonitoring REG_DWORD 1

    Tested on Windows 10 Version 10.0.17134 Build 17134

    But, during my computer idle, windows always put Real-time protection on. It is so annoying. I want to control Real-time Protection manually.
     
    IGA Made Muliarsa, Apr 16, 2020
    #2
  3. Windows Defender Real Time Protection Service slowing down file access

    I noticed after a recent Windows 10 update that Windows Defender's real-time protection
    dramatically slows file system access.

    I timed how long it took to build a (Delphi XE6) project with Windows Defender's real-time protection off and on in order to get a sense of how bad it is.


    Windows Defender Real-Time Protection is making my SMB Share slow 4faf6467-088e-4569-87d4-259624a4dc91.png


    I did nothing but alternate between real-time protection off and on (no reboots required, physical hardware):

    Trial
    Real-time protection status
    Build time (s)

    1
    On
    86.4 s

    2
    Off
    4.0 s

    3
    On
    84.0 s

    4
    Off
    4.0 s

    5
    On
    86.9 s

    6
    Off
    4.1 s

    7
    On
    87.4 s

    8
    Off
    3.9 s

    Which means:

    • Build time with real-time protection off: 4.0 s (sd: 0.082 s)
    • Build time with real-time protection on: 86.2 s (sd: 1.51 s)


    Windows Defender Real-Time Protection is making my SMB Share slow 463c8028-6809-4b99-b8c5-79c4aa4126b5.png


    This means that Windows Defender in Windows 10 has now entered the realm of other crappy anti-virus products - that are a detriment to the user's PC rather than a benefit.

    • Of course i'm not going to wipe my PC and reinstall everything.
    • Of course there is no other anti-virus software installed.
    • Of course i made no changes to this PC prior to this happening.
    • Of course this is not a virtual machine.
    • It spontaneously started Wednesday October 19.
    • I have no idea what could have happened to my PC between 5pm on October 18th, and 9am on October 19th:

    Windows Defender Real-Time Protection is making my SMB Share slow e9b5b2d7-93db-4792-ad78-025aa381d5b3.png


    No idea whatsoever.

    Without disabling Windows Defender Real-time protection, how do I make Windows Defender not perform file-scans before an application attempts to open a file? That is: how do i make Microsoft's own anti-virus software as fast at it used to be in Windows Vista,
    Windows 7, Windows 8, Windows 8.1, and Windows 10 before a recent update?

    Bonus Reading

    This question has of course already been asked, and ignored, on these forums.


    ***Post moved by the moderator to the appropriate forum category.***
     
    JackTripper, Apr 16, 2020
    #3
  4. adonis08 Win User

    Windows Defender Real-Time Protection is making my SMB Share slow

    Windows Defender Real Time Protection

    I did all the step and delete the MsMpEng.exe but still it doesn't turn on Real Time Protection any suggestion please??
     
    adonis08, Apr 16, 2020
    #4
Thema:

Windows Defender Real-Time Protection is making my SMB Share slow

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