How to Fix Avast High CPU Usage Problem – Steps by Step

The Avast high CPU usage problem has become a pretty pressing issue for too many users as reported by the latter. According to the users, the Avast high CPU usage problem has caused a 50 percent usage of CPU.

To reduce Avast high CPU usage issue, first disable scanning of the screensaver. Now disable the mail shield to stop unnecessary functions. Disable the updater notifications. Remove the Avast cleanup app by clicking the components. Remove addons that are not necessary. Doing these will solve the Avast high CPU usage.

All the steps are carefully explained below.

If this problem continues, you may face interruption while working and after a point the Avast high CPU usage issue does get very irritating. Not to worry though, as there are multiple ways of solving the problem. 

1. Avast Screensaver Scanning

Sometimes the Avast high CPU usage issue can have some connection with the Avast Screensaver. Even though the latter is not operational, the scan may continue regardless.

This is not a consistent thing, and yet every time it happens the system is posed by the Avast high CPU usage issue. Additionally, it never shows up in the interface of Avast. But there is a way you can fix it.

  • Choose any file on your system and then right-click on it.
  • Choose the option of scanning this file with the help of Avast.
  • You will see a window of a scan result pop up on your screen.
  • The scanning list will be displayed in front of you.
  • Search for the scanning of the screensaver and click on Stop.
  • Now check if the Avast high CPU usage issue is still bothering you or not.

2. Command Prompt Tweak

The next solution to fix the Avast high CPU usage issue is rather simple. It aims to change the frequency with which scanning takes place. The background checks will be disabled and so will the monitoring.

Some security problems are bound to happen but you will get rid of the Avast high CPU usage issue. The steps of this procedure are as follows: 

  • Press Windows + X and open Command Prompt option.
  • You can also right-click on the Start Menu or just search for the above option.
  • Following this, select Run as administrator.
  • Type C: ProgramDataAvastSoftwareAvast to find the folder on which you will execute later actions.
  • Go to the avast5.ini file and type [GrimeFighter]: ScanFrequency=999.
  • After saving the file, reboot the system and see if you are still facing the error.

The Avast high CPU usage issue should not bother you anymore.

3. Disabling the Mail Shield

Avast has a feature called the Mail Shield. Sometimes it causes disruption in its performance thereby causing the Avast high CPU usage issue. To prevent that from happening, here are the steps of disabling this feature.

  • Open the system tray to launch Avast.
  • Select the option that says Menu.
  • Now choose the option that says Settings.
  • Select the tab that reads Protection.
  • Choose the option called Core Shields.
  • Keep scrolling until you find the tab that reads Mail Shield and then click on it.
  • Click on every checkbox and then select the Indefinitely option in the time period section.
  • Now restart Avast to see if the Avast high CPU usage is still there or not.

One thing that you must ensure is that apart from Mail Shield, no other option should be unchecked. In case you uncheck any other shield, it might not be able to detect any attack by malware. So, be alert.

4. Disabling the Updater Notifications

Chances are that if Avast is sending you a notification about a possible update, it may face certain glitches. This in turn might trigger the Avast high CPU usage issue.

This makes it essential to disable the updater notifications to prevent the Avast high CPU usage issue. This is how it is done.

  • Go to Avast, open it and then wait until it loads completely.
  • Select the icon that says Menu to your top right and then click on Settings.
  • Now select the Performance tab which is to your left.
  • From their go to the option that says Software Updater.
  • Click on the checkbox that says Notifications about new Updates to uncheck it.
  • Close the window.

Once this is done, reinstall Avast fully and check if your system is having to face the Avast high CPU usage issue again.

5. Removing Avast Cleanup

Avast Cleanup is often said to be the greatest offender when it comes to the Avast high CPU usage issue. It functions in real time and as a result frees up certain resources which have been allocated by some other app.

The thing about real time apps is that when they are in action, it takes a toll on the processor of the system. And therefore, the only way you can prevent the Avast high CPU usage issue is by uninstalling Avast Cleanup. Here is how it is done.

  • Go to the user interface of Avast and then open it.
  • You can do so by clicking the icon or even finding it out from the Start menu.
  • Now go to Settings and then select the tab that reads Components.
  • Click on the arrow that is facing downwards against Avast Cleanup.
  • Select the Uninstall Component option.
  • Now click on OK for confirming this uninstalling.
  • Reboot your system so that the changes are confirmed.
  • Check if the Avast high CPU usage issue is still there or not.

Supposing that the above process bears no fruit, try the same with another component titled Behaviour Shield.

6. Removing addons that are not necessary

You can always expect Avast to comprise plenty of quirks and characteristics which enable it to function more effectively. However, a majority of users do not actually require these extra features.

As a result, these addons end up being a burden on the usage of resources. Therefore, to prevent the Avast high CPU usage issue, you need to uninstall a few features. The steps of this process are as follows.

  • Press Windows and R simultaneously which will open the Run prompt.
  • Enter the words Control Panel and then press Enter.
  • This will open the interface of the classical control panel.
  • Click on an option that says ‘View by’ and then choose the ‘Category’ option.
  • Click on a button that says Uninstall a Program which is below the Programs heading.
  • You will see an option that reads Avast Antivirus. Right click on it and then choose Uninstall.
  • The request will take some time to process and after that a window will pop up.
  • Select the option that says Modify.
  • Except for the options listed below, uncheck all the others.

    • Behaviour Shield
    • File Shield
    • Mail Shield
    • Web Shield
  • Select Change and then wait for installation to be over.
  • Now check if you still have to deal with the Avast high CPU usage issue.

7. Updating to the latest version

If your version of Avast is too outdated, then it has probably become too unresponsive to any change. It is a good thing to always keep your antivirus and database of the virus definitions updated so that it can run successfully without any hindrance.

The steps to update Avast and consequently prevent the Avast high CPU usage issue are as follows.

  • Open the user interface of Avast.
  • Go to the tab that says Update.
  • There will be two buttons – one regarding updating the database of the virus definitions and one regarding updating the antivirus. 
  • Click on both buttons and wait for sometime as the updates are checked by Avast.
  • You will see some instructions popping up on screen. Follow them.
  • Now check if the Avast high CPU usage issue is still bothering you or not.

Updating Avast and other software is important to fix the bugs and for the proper functioning of the software. With every update the developers improve the features of the software so that it may work more efficiently and faster.

I know that we have disabled several features of Avast in order to speed it up. Doing this will certainly solve the CPU usage issue caused by Avast. However, once the issue has been fixed, if you wish you can enable these features one by one while keeping a check on the CPU usage.

Although, most of the features that we just disabled to speed up the CPU are not as important but you may need some of these based on the scope of your work.

Login/Register access is temporary disabled