Author Topic: Avastsvc uses 25% CPU all the time  (Read 2265 times)

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Offline avast_user321654

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Re: Avastsvc uses 25% CPU all the time
« Reply #15 on: August 29, 2021, 09:28:04 PM »
The problem goes from Avast 9 to 17 : i have the same problem and just installed avast 17 on a factory system image from 2013 with an offline VPS update (28/08/2021).

The first version which should be ok (as far as my tests go on win7 SP1) is avast 19.

By the way, edialchu, avast 19 is available on filepuma (search on google : "site:filepuma.com avast 19") and you can install it. Only some recent avast21 versions ask for a win7 update.

The real problem is :
- yes we could upgrade to win7SP2 or even win10
- yes we could upgrade to avast19 or even avast21

But in my long experience, there is no update (OS or software) which makes things lighter. And i tried avast 19, 20, 21 : they're all heavier than avast 9 (surpriiiiise). Moreover, avast9 is more customisable.

Everyone does not own a powerful PC, nor does want/afford one.
My PC is a 2013 netbook, which was already considered as "weak" at the time.
My weak PC is functional and i refuse to throw it away or make it kneel because of "forced" updates. Reasons : money, environment, principles.

Our problem is triggered by a VPS update, because at least three users around the world had the same problem the same day. We are not asking complete maintenance on old avast versions.

I'm pretty sure there's just one single virus definition which poses a problem between two consecutive days.
« Last Edit: August 29, 2021, 09:30:26 PM by avast_user321654 »

Offline DavidR

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Re: Avastsvc uses 25% CPU all the time
« Reply #16 on: August 29, 2021, 09:44:08 PM »
Many thanks for your help but if avast wants that all users update to the last version how I know that this version that you mention will not have the same problem.

I turn on another computer with windows 7 and an old version of avast and it happens the same problem.Last monday it was going well.It is obviously that avast change something.

The short answer (as an avast user) is no I can't, as I haven't any idea why this has all of a sudden happened. To you, my comment about avast 18.8 being the last supported version for XP didn't work for some (including myself) and they had to go back to 18.5 to resolve it. 

At the time, because this was the last supported version Avast were considering a fix (if they could find the problem) on the last supported version.  This however never happened to my knowledge.  So there is history there of not fixing old unsupported versions.

Virus definitions, or rather Engine and virus definitions are regularly updated, so I don't know if they would/could deliver an Engine Update on very old versions.

The simple fact that old OSes and Antivirus versions leave the system less well protected as time and malware marches on.  What the user is to do about that really is a user choice. 

Switching AVs is an option, but will that AV support the old OS in its current version or would you be faced with the same situation.
Windows 10 Home 64bit/ Acer Aspire F15/ Intel Core i5 7200U 2.5GHz, 8GB DDR4 memory, 256GB SSD, 1TB HDD/ avast! free 22.2.6003 (build 22.2.7013.717) UI 1.0.697/ Firefox, uBlock Origin, uMatrix/ MailWasher Pro/ Avast! Mobile Security

Offline edialechu

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Re: Avastsvc uses 25% CPU all the time
« Reply #17 on: August 30, 2021, 01:50:10 AM »
The same day that began the problems 25 August it was the announcement of the new version:
https://forum.avast.com/index.php?topic=299095.msg1649279#msg1649279

Offline DavidR

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Re: Avastsvc uses 25% CPU all the time
« Reply #18 on: August 30, 2021, 11:47:13 AM »
The same day that began the problems 25 August it was the announcement of the new version:
https://forum.avast.com/index.php?topic=299095.msg1649279#msg1649279


Which give that you still have avast free 17.9.2322, means you haven't got avast 21.7, so that shouldn't have had any impact.

I assume (dangerous) that you have avasts program update set to Manual (which I have) to prevent automatic program updates ?
Windows 10 Home 64bit/ Acer Aspire F15/ Intel Core i5 7200U 2.5GHz, 8GB DDR4 memory, 256GB SSD, 1TB HDD/ avast! free 22.2.6003 (build 22.2.7013.717) UI 1.0.697/ Firefox, uBlock Origin, uMatrix/ MailWasher Pro/ Avast! Mobile Security

Offline edialechu

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Re: Avastsvc uses 25% CPU all the time
« Reply #19 on: August 30, 2021, 12:13:23 PM »
You are right it shouldnt have had any impact but it had not only for me but for more people.
My computer's parents have the same problem also my husband's computer all with windows 7 and different old avast versions and the problem appeared on 25 August a coincidence? I don't think so. 4 computers that suddenly go wrong I don't know what to do.The situation is distressing.
I have set to manual avast updates because in the past when I had set on automatic the computer didnt start again the screen went black and the same problem happened me on different computers so that was the solution I found on that time to set it manually.I hope that avast could review what happen.
« Last Edit: August 30, 2021, 12:37:38 PM by edialechu »

Offline DavidR

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Re: Avastsvc uses 25% CPU all the time
« Reply #20 on: August 30, 2021, 12:29:18 PM »
You have to compare what others reporting an issue have, is their OS and avast program version the same.  In your case with win7 and avast 17.9 do they have the same.

If this were truly a major issue (with hundreds of millions of avast users) this forum would be red hot.
Windows 10 Home 64bit/ Acer Aspire F15/ Intel Core i5 7200U 2.5GHz, 8GB DDR4 memory, 256GB SSD, 1TB HDD/ avast! free 22.2.6003 (build 22.2.7013.717) UI 1.0.697/ Firefox, uBlock Origin, uMatrix/ MailWasher Pro/ Avast! Mobile Security

Offline edialechu

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Re: Avastsvc uses 25% CPU all the time
« Reply #21 on: August 31, 2021, 02:00:34 PM »
I was making some investigation and it could be possible that the problem appears when avast tries to make the rootkits analysis on startup in old versions.
It could be possible that avast makes some changes for the new version on the defense module and mainly on the rootkits analysis and those changes affected old versions.

Offline edialechu

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Re: Avastsvc uses 25% CPU all the time
« Reply #22 on: August 31, 2021, 08:20:29 PM »
I can confirm that on another computer with the same operating system and the same version 17.9.2322 happens the same problem.

Offline DavidR

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Re: Avastsvc uses 25% CPU all the time
« Reply #23 on: September 01, 2021, 12:14:46 AM »
Is it time to try a more recent version !
Windows 10 Home 64bit/ Acer Aspire F15/ Intel Core i5 7200U 2.5GHz, 8GB DDR4 memory, 256GB SSD, 1TB HDD/ avast! free 22.2.6003 (build 22.2.7013.717) UI 1.0.697/ Firefox, uBlock Origin, uMatrix/ MailWasher Pro/ Avast! Mobile Security