How can I change the cpu priority for msmpeng.exe?


K

KDAM71

Active member
Local time
12:53 AM
Posts
32
OS
Windows 11
Hello

I like to scan my disks regularly using defender. I'd also like to keep using windows during the scan. When defender is scanning my disks the cpu usage by msmpeng is around 80%. I tried lowering the priority but I get the message "access denied". Then I tried to take ownership of msmpeng but that was denied as well.
Does someone know a way to lower priority for msmpeng?

Kind regards, Klaas
 

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Windows 1111th Gen Intel(R) Core(TM) i5-11400H @ 2.70GH...8GBNVidia GeForce RTX 3050 Laptop GPU, Intel UHD...
OS
Windows 11
Computer type
Laptop
Manufacturer/Model
MSI
CPU
11th Gen Intel(R) Core(TM) i5-11400H @ 2.70GHz 2.69 G
Motherboard
I don't know. Laptop model is GF63 Thin 11 UC
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8GB
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NVidia GeForce RTX 3050 Laptop GPU, Intel UHD Graphics
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I mainly use a Logitech bluetooth audio receiver
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I use the buildin laptop screen which uses Intel UHD Graphics
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WDC PC SN540 SDDPNPF-512G-1032
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You can use attached batch script to change Windows Defender Antivirus Maximum CPU Usage for a Scan in Windows 10 and Windows 11.
 

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My Computer My Computer

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Windows 11AMD Ryzen 7 5700GMicron Technology DDR4-3200 16GBNVIDIA GeForce RTX 3060
OS
Windows 11
Computer type
PC/Desktop
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HP Pavilion
CPU
AMD Ryzen 7 5700G
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Erica6
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Micron Technology DDR4-3200 16GB
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FreeBooter said:
You can use attached batch script to change Windows Defender Antivirus Maximum CPU Usage for a Scan in Windows 10 and Windows 11.
Click to expand...
Thanks for the effort but it doesn't seem to change the cpu usage. I chose 20.
Is this supposed to be a permanent change? Should I restart windows for the change to take effect?
 

My Computer My Computer

At a glance

Windows 1111th Gen Intel(R) Core(TM) i5-11400H @ 2.70GH...8GBNVidia GeForce RTX 3050 Laptop GPU, Intel UHD...
OS
Windows 11
Computer type
Laptop
Manufacturer/Model
MSI
CPU
11th Gen Intel(R) Core(TM) i5-11400H @ 2.70GHz 2.69 G
Motherboard
I don't know. Laptop model is GF63 Thin 11 UC
Memory
8GB
Graphics Card(s)
NVidia GeForce RTX 3050 Laptop GPU, Intel UHD Graphics
Sound Card
I mainly use a Logitech bluetooth audio receiver
Monitor(s) Displays
I use the buildin laptop screen which uses Intel UHD Graphics
Screen Resolution
1920x1080
Hard Drives
WDC PC SN540 SDDPNPF-512G-1032
Mouse
Touchpad
Internet Speed
DSL
Browser
Firefox
Antivirus
Windows Defender
Reboot to see changes take effect, don't forget the batch script use for lowering defender scan CPU usage.
 

My Computer My Computer

At a glance

Windows 11AMD Ryzen 7 5700GMicron Technology DDR4-3200 16GBNVIDIA GeForce RTX 3060
OS
Windows 11
Computer type
PC/Desktop
Manufacturer/Model
HP Pavilion
CPU
AMD Ryzen 7 5700G
Motherboard
Erica6
Memory
Micron Technology DDR4-3200 16GB
Graphics Card(s)
NVIDIA GeForce RTX 3060
Sound Card
Realtek ALC671
Monitor(s) Displays
Samsung SyncMaster U28E590
Screen Resolution
3840 x 2160
Hard Drives
SAMSUNG MZVLQ1T0HALB-000H1

My Computer My Computer

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Home26H2CanAMD Ryzen 5 8600G (07/24)2x32GB Kingston FURY DDR5 5600 MHz CL36 @5200...ASROCK Radeon RX 6600 Challenger D 8G @48FPS ...
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AMD Ryzen 5 8600G (07/24)
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ASROCK B650M-HDV/M.2 (07/24) BIOS 4.21 AGESA ComboAM5 1.3.0.1 (04/26)
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FreeBooter said:
Reboot to see changes take effect, don't forget the batch script use for lowering defender scan CPU usage.
Click to expand...
I ran the script, chose 20, rebooted and started the scan. The cpu usage is around 90% for a while now.
 

My Computer My Computer

At a glance

Windows 1111th Gen Intel(R) Core(TM) i5-11400H @ 2.70GH...8GBNVidia GeForce RTX 3050 Laptop GPU, Intel UHD...
OS
Windows 11
Computer type
Laptop
Manufacturer/Model
MSI
CPU
11th Gen Intel(R) Core(TM) i5-11400H @ 2.70GHz 2.69 G
Motherboard
I don't know. Laptop model is GF63 Thin 11 UC
Memory
8GB
Graphics Card(s)
NVidia GeForce RTX 3050 Laptop GPU, Intel UHD Graphics
Sound Card
I mainly use a Logitech bluetooth audio receiver
Monitor(s) Displays
I use the buildin laptop screen which uses Intel UHD Graphics
Screen Resolution
1920x1080
Hard Drives
WDC PC SN540 SDDPNPF-512G-1032
Mouse
Touchpad
Internet Speed
DSL
Browser
Firefox
Antivirus
Windows Defender
www.majorgeeks.com

How to Change Windows Defender Max CPU Usage - MajorGeeks

Windows Defender has come a long way, now becoming the default antivirus program for most geeks. That doesn't mean you can't make some tweaks, however. One tweak we love to apply is limiting the maximum amount of CPU used during scans.
www.majorgeeks.com
 

My Computer My Computer

At a glance

Windows 11AMD Ryzen 7 5700GMicron Technology DDR4-3200 16GBNVIDIA GeForce RTX 3060
OS
Windows 11
Computer type
PC/Desktop
Manufacturer/Model
HP Pavilion
CPU
AMD Ryzen 7 5700G
Motherboard
Erica6
Memory
Micron Technology DDR4-3200 16GB
Graphics Card(s)
NVIDIA GeForce RTX 3060
Sound Card
Realtek ALC671
Monitor(s) Displays
Samsung SyncMaster U28E590
Screen Resolution
3840 x 2160
Hard Drives
SAMSUNG MZVLQ1T0HALB-000H1
FreeBooter said:
www.majorgeeks.com

How to Change Windows Defender Max CPU Usage - MajorGeeks

Windows Defender has come a long way, now becoming the default antivirus program for most geeks. That doesn't mean you can't make some tweaks, however. One tweak we love to apply is limiting the maximum amount of CPU used during scans.
www.majorgeeks.com
Click to expand...
Thanks. Your script has set the value properly. It doesn't seem to have the desired effect on my computer though.
Now I set the value to 5. I rebooted and started the scan. The cpu usage stays under 10% for about a minute. Than it jumps to around 90% and stays there for about 7 minutes. Than it gradually comes down to under 10% again and stays there for the remainder of the scan (about 11 minutes).
 

My Computer My Computer

At a glance

Windows 1111th Gen Intel(R) Core(TM) i5-11400H @ 2.70GH...8GBNVidia GeForce RTX 3050 Laptop GPU, Intel UHD...
OS
Windows 11
Computer type
Laptop
Manufacturer/Model
MSI
CPU
11th Gen Intel(R) Core(TM) i5-11400H @ 2.70GHz 2.69 G
Motherboard
I don't know. Laptop model is GF63 Thin 11 UC
Memory
8GB
Graphics Card(s)
NVidia GeForce RTX 3050 Laptop GPU, Intel UHD Graphics
Sound Card
I mainly use a Logitech bluetooth audio receiver
Monitor(s) Displays
I use the buildin laptop screen which uses Intel UHD Graphics
Screen Resolution
1920x1080
Hard Drives
WDC PC SN540 SDDPNPF-512G-1032
Mouse
Touchpad
Internet Speed
DSL
Browser
Firefox
Antivirus
Windows Defender
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