Avast Antivirus 100% Disk consumption

[Vojtěch21]

Hi,

I cannot use my laptop, because Avast Antivirus Installer is using all my disk capacity (I have Win 10, HP Pro Book, SSD disk). But no instalation is running.

See attachment.

I tryed to uninstal and make a new instalation, but it did not change anything. I am thinking of using another antivirus now.

There are a lot of same topics, but I did not find the solution. Can anyone help?

Thank you!

[Pondus]

Have you tried repair and reboot?  >>  https://support.avast.com/en-eu/article/Repair-Antivirus

[bob3160]

It is also possible that you have auto update allowed and Avast is updating to the latest version.
You didn't give us any information so we are left to guess as to what is happening.

[Vojtěch21]

Hi there,

it seems that the repair worked well. Thank you for your help!

[swegmike]

I've also noticed that cpu utilization is also near 100% on first login since it is doing a "quick" scan of the HDD before one does to much work on the computer.  This will die down after about 5 minutes so one can get control of the computer back to do something. Thus there is a long delay opening any application such as a web browser i.e. firefox. Of course firefox takes a long time open even when the avast isn't scanning it just becomes extra long.

Although I'm the administrator, there is no way to set the priority of the avast task that is running so that I can get some cpu time due to no permissions message popup.  I guess this is to prevent rogue programs from changing the priority to a lower value. 

Wish avast would allow the priority configuration to be changed i.e. to low and not normal etc.

[Cluster-Lizard2014]

Are you sure it is still AVAST doing that?

I ask because I had the same thing on a Win7 machine although the effect on performance was not as serious as described. I first noticed the problem because all my system fans were going full speed, something that had never happened before.

Process Hacker 2 (a useful alternative to Task Manager) includes a very useful system tray bar graph which expands to list the current top 15 resource using processes. With that I found MS had managed to sneak "telemetry" gathering 'updates' onto my PC even though I'd opted out of the User Experience reporting options.

This "telemetry" gathering shot the CPU use up to 90+% for a couple of minutes after boot up. Using the info Process Hacker 2 gave me plus some research I found the three culprits. Only two matched those mentioned by others as causing this sort of thing but the third was clearly involved so I disabled it too and eventually deleted the related scheduled task.

Boot up CPU use went back to normal afterwards.   

[Vojtěch21]

Hi,

so the problem occured again after waking from "sleep". The computer is paralysed with the disk usage. Without that the PC is running fast, I do not have many installed softwares, no games etc.

Any Idea? What information would you need to make better diagnoses?

Thank you!