Windows 10: MsMpEng.exe are missing. how to redownload for open defender virus

i deleted MsMpEng.exe and it missing. how to redownload for open defender virus

:)

 

Programs Slow To Open Due To Windows Defender (MsMpEng)


This is something that I've noticed since Windows 8, but Windows Defender make some programs so slow to open. It's pretty noticeable on the programs that it does it on as it takes approx. 20-30 seconds to open them, even from an SSD, and if you look at Resource Monitor listed by CPU usage, you can see it's due to MsMpEng.exe running a scan before the program will open.

It would be understandable if it was doing it the first time the program had ever ran, or if the program wasn't signed, but that's not always the case. Canon DPP for example isn't signed, so presumably that's why Defender keeps scanning that, however here's an example of another program (SyncBackFree) that is signed, but yet Windows Defender still wants to keep scanning it on a daily basis despite nothing changing since previous scans.





Obviously I can add individual programs to the Windows Defender Exclusion list and exclude them from real-time protection, but what it is that Defender doesn't like with certain programs that is feels the need to keep scanning them daily? Is this a Microsoft problem, or is it down to the software not adhering to some sort of best practice policies Microsoft have laid out? There must me something that makes Defender treat it as potentially signed malware?

 

windows defender exe missing

If you are unable to find Windows Security or Windows Defender on your PC running Windows 10 Pro for Workstations, it's possible that the application might be disabled, or there could be an issue with the installation. Here are some steps you can try to resolve the issue and ensure that Windows Security (formerly known as Windows Defender) is active on your system:

1. Check if Windows Security is enabled:
   
   • Press the Windows key + I to open the Settings app.
     
   • Go to Update & Security.
     
   • In the left pane, select Windows Security.
     
   • Check if it shows "You're protected" or any security status. If you see any issues or errors, follow the on-screen instructions to resolve them.
     
2. Check Windows Security Service:
   
   • Press the Windows key + R to open the Run dialog box.
     
   • Type "services.msc" (without quotes) and press Enter.
     
   • In the Services window, look for "Windows Defender Antivirus Service."
     
   • Make sure the service status is "Running" and the startup type is set to "Automatic." If not, right-click on the service, choose "Properties," set the startup type to "Automatic," click "Start," and then click "OK."
     
3. Perform a Full System Scan:
   
   • If you can access Windows Security, perform a full system scan to ensure your PC is free from any threats.
     
4. Enable Windows Defender through Group Policy (for advanced users):
   
   • Press the Windows key + R to open the Run dialog box.
     
   • Type "gpedit.msc" (without quotes) and press Enter to open the Local Group Policy Editor.
     
   • Navigate to "Computer Configuration" > "Administrative Templates" > "Windows Components" > "Windows Defender Antivirus."
     
   • Look for the policy named "Turn off Windows Defender Antivirus."
     
   • Double-click on it and set it to "Not Configured" or "Disabled."
     
   • Click "Apply" and then "OK."
     
5. Check for Windows updates:
   
   • Sometimes, missing features or issues with Windows Security can be resolved by installing the latest Windows updates. Make sure your system is up-to-date by going to Settings > Update & Security > Windows Update.
     

If you've tried the above steps and Windows Security is still not visible or working correctly, there might be an issue with the Windows installation. In that case, you can try running the "sfc /scannow" command in the Command Prompt to scan and repair system files. Additionally, consider checking for malware or other third-party security software that might be conflicting with Windows Security.

If the problem persists, I recommend reaching out to Microsoft support or a qualified computer technician for further assistance, as they can help you troubleshoot the specific issue with your Windows 10 Pro for Workstations installation.

 

"Virus and Threat Scan" Option missing from Windows Defender

Apologies, I misunderstood Step 5 and found the two files as mentioned and have now disabled them both alongside the "Client Interface's" option of "Enable headless UI mode". After restarting Win10 and opening Windows Defender, the issue still persists with
"Virus and Threat Protection" Option still missing.

I also tried the REG DELETE command for the Command Prompt and it gave me same error " system unable to find the specified registry key or value." That;s update I have regarding this issue.