Windows 10: How to solve Defender real time protection slowing down icon display ?

One of the example is as seen on the picture of my desktop above :
1. first condition, the icon with all the arrow there

2. I right-click the desktop and choose refresh

3. the arrow gone and start showing on each icon


The other thing is if I open "This PC", the window open blank for just a second with text "working on it", then all the drives icon is like a rectangular blank paper, then finally it show all the drive's icon.

After trying to do this and that which I found from the internet but no luck, finally I found a comment in superuser forum : go in the settings app and stop real time protection of Windows defender. is it faster now?


So I tried that and yes it's back to normal now ... no more drawing icon after I click refresh.

I found a similar thread :
Defender real time protection causes slow icon drawing exe files


But the thread is locked and doesn't have an answer.
I wonder if it's solved yet.

Any kind of respond would be greatly appreciated.
Thank you in advanced.

:)

 

Defender real time protection causes slow icon drawing (exe files)

Windows defender is causing slow Drawing of icons for .exe because of defender. my downloads folder has numerous exe files and they are slow to draw for several seconds due to antimalware service kicking in. It only happens first time I open, after that
it's instant - until the next reboot when the same happens! By turning off real time protection and it becomes instant. So defender is the culprit.

It has another annoying side effect when I reboot. My desktop displays and some of the shortcut icons on here takes a few seconds to display. They have white generic paper icons on some of them before they all draw properly. Again it's defender that is causing
it.

This needs addressing by MS I think

 

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.

 

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.





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)

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:

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.

• Microsoft Answers: Windows Defender Real Time Protection Service slowing down Visual Studio
  etc.
• Stackoverflow: Windows Defender Real Time Protection Service slowing down Visual Studio etc
• Stackoverflow:
  Slow page refresh times during development
• Speed Up Visual Studio Build Times (by disabling Windows Defender)

***Post moved by the moderator to the appropriate forum category.***