Windows 10: Windows Defender real time protection service didn't open

can i run back my real time protection and keep my windows safely?please unblocked my program from your group policy

:)

 

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??

 

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.***

 

Windows Defender Real-time protection

Thankfully we can enforce Defender’s Group Policy settings without using the Group Policy Editor, and without merging a downloaded REG file
– and the alternative is amazingly quick and easy. I’m going to recommend against disabling Defender with the DisableAntiSpyware DWORD, because I’m seeing some really bizarre behavior when I use a REG command for this in Version 1709.
On the other hand, there doesn’t seem to be any problem at all with turning Defender’s real-time protection on or off with these REG commands:

Click on the Start button and select Windows Powershell (Admin) and then copy, paste, and enter the command:

Turn off Windows Defender’s real-time protection:

REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableRealtimeMonitoring /t REG_DWORD /d 1 /f

Turn on Windows Defender’s real-time protection:

REG DELETE "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableRealtimeMonitoring