Windows 10: Windows defender taking 13.7% of cpu and 77mb/s of disk

Hello! I have a pretty powerful cpu and my disk is fine (i have an i7 7700)

Antimalware service executable started taking today about 15% cpu and 70mb/s of disk, this happened after I did a full scan. It sometimes goes to 30% cpu and 100mb/s

I tried restarting my pc 2 times, and it will go constantly, even 10 minutes after launching my PC. I tried using task scheduler and putting the MsMpEng.exe as an exclusion in windows defender, I tried scanning for corrupted files via cmd.

After all of this things done, it's the same thing, can anyone help me? The file is 100% from Windows, it is in system32 and I tried using Process Explorer and it is a verified Microsoft executable file. Sometimes it goes to 0% but after max 15 seconds it goes back. I have Windows 10 Home. I have never encountered this problem ever.



edit: grammar

submitted by /u/p1nQ
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:)

 

Windows Defender - high CPU and disk usage

Thank you very much for your quick response. I've taken all steps you suggested. This is the outcome:

• Add a process exclusion
  
  Unfortunately, this didn't work. I added both a path and a process exclusion now.The task scheduler for
• Defender looks like this for me:
  
  
  
  

• It seems no Defender tasks have run since June 30th, yet the process continues to hog the CPU
• I re-ran SFC /scannow. SFC could not find any integrity violations
• I tried disabling behaviour monitoring. The setting did not persist across a reboot, and turning it off did not make a difference while my system was still running.
  
  
  This was the output for Powershell:
  
  

PS C:\Windows\system32> Set-MpPreference -DisableBehaviorMonitoring $True

PS C:\Windows\system32> Get-MpPreference | findstr "Behavior"

DisableBehaviorMonitoring : True

PS C:\Windows\system32>

• Scanning for viruses and leftover antivirus software. This was interesting (yet unfruitful):
  
  Neither Kaspersky nor Emisoft could find any threats. MalwareBytes did find 5 executables in my temp folder, although Virustotal.com reported no danger for the files. This could mean it's a false positive, but I removed all traces of them anyway.
  
  It also found two installers (PUPs) for a Spigot toolbar, I removed those as well. They probably came with some free software package, I try to prevent installing toolbars.
• In installed AVG Anti Virus (the free version). When I rebooted after the installation, Defender was still running and taking up 25-30% of my CPU. I disabled Defender using the Group Policy editor and the service finally stopped.

AVG works for me, but like most free anti virus programs it's full of ads and "free offers" and fishy SSL/TLS interception ("web protection").

I'd like to keep using Windows Defender because it's neatly integrated into Windows 10, doesn't take a lot of resources and doesn't show annoying ads.

I hope anyone can suggest another way to fix this weird Windows Defender problem.

 

Windows explorer takes up most of CPU

Hi,

Stored files and data may have caused the Windows Explorer to take up most spaces on your CPU. To correct this, we suggest that you follow these methods:

Method 1: Disk cleanup in Windows 10.

Method 2: Managing the Task Manager.

• Open the Task Manager by pressing Ctrl+Alt+Delete.
• Terminate explorer.exe.
• Start a new explorer.exe.

Let us know if any of these methods worked.

 

Disk management console view is not up-to-date

i dont know how to fix your disk management, but i can fix your partition problems...




open up Command Prompt with admin rights. (Right click, run as admin)


enter in
DISKPART
list disk

then find the Disk number for your Raid array... lets call it number 7 ( you can tell what disk is what by the total size)
type in

Select Disk 7
List Partition (will give you a list of all the partitions..)
Select Partition 1 (im assuming you only have 1 partition on Disk 7) repeat this step if you have more partitions.
ASSIGN


that should get the array up and running ready to use.


EDITED.

any problems, post back ^^


Still EDITING *Stick Out Tongue

side question, have you tried restarting the PC?