High CPU usage during Full Scan

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Pramit Kumar Biswas

Pramit Kumar Biswas

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Aug 25, 2015
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When I scan my computer (Full scan) with Kaspersky Internet Security 2015 , the CPU usage is as high as 80% or some times even more. The process avpui.exe in task manager is eating around 70% during full scan. Also I noticed that the 1st core works a bit much more than the other cores and also the 3rd core works a bit less than other cores. The usage is like
Core 0 = 93%
Core 1 = 78%
Core 2 = 67%
Core 3 = 83%
Is that normal??? Is that the weird nature of the Intel Quad Core CPUs??
I have got a 3 months old 4th Gen Core i5 4440 (3.3 GHz). Looking forward to your replies. Thank You :)
 
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A
Quick answer: Yes, this is perfectly normal.

Most antivirus programs will run at close to maximum CPU usage, as long as the flow of files from your hard disk is sufficiently fast to keep the scanning engine fed.

Some antivirus programs may have a "Background" scan option, which will run the scan processes in a lower priority, so if you use your PC for anything else, it will concede CPU time to whatever program is asking for it.
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The Darkeye

The Darkeye

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Oct 9, 2015
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Hello,
Yes this should be normal since Kaspersky is just taking alot.
I would recommend you do those full scans when you dont need your pc.
Otherwise i recommend that you just dont use it at all, untill you do need a definit scan.
Goodluck

William
 
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alexandergc

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Jan 8, 2012
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Quick answer: Yes, this is perfectly normal.

Most antivirus programs will run at close to maximum CPU usage, as long as the flow of files from your hard disk is sufficiently fast to keep the scanning engine fed.

Some antivirus programs may have a "Background" scan option, which will run the scan processes in a lower priority, so if you use your PC for anything else, it will concede CPU time to whatever program is asking for it.
 
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The Darkeye

The Darkeye

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Oct 9, 2015
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Its normal that those bounce from each other.
I guess it will be normal when the Kaspersky is gone/notON

 
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alexandergc

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Yes, not all programs are made to take advantage of multi-core CPU's, but Windows does a pretty good job of scheduling CPU time equally.
I'd suspect the highest usages are from the scanning engine itself while the lower usage comes from maintaining the UI and preparing files for scanning plus whatever background processes are running on your system.

If you're feeling adventurous, you could always play around with the Core Affinity setting in your Windows Task Manager.

>> Highly NOT recommended to fiddle with that though, unless you have a very specific use-case! <<
 
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alexandergc

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Thanks for the Best Answer!

As a side note, I schedule my antivirus/defrag/backup/update operations to happen either when I'm at work, or when I'm sleeping.
Having an auto-shutdown toggle when the task completes is also really helpful for keeping power usage down but still having a hassle-free time when I actually need to use my PC.

You might want to look into scheduling your scans to a more convenient time if it's stopping you from using your PC when you want it.
 
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