How to fix Avast service high CPU usage on Windows 10, 11

Avast is one of the most popular antivirus software that protects your system from viruses, trojans, and malware. However, some Avast users have reported issues with very high CPU usage of the Avast service on their computers. According to them, this anomaly caused very high CPU usage, rendering the system inoperable. Therefore, your system may stop responding unless you resolve this issue.

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All antivirus (even Windows Security Center) software tends to consume a lot of CPU and disk resources, even when running in the background. It runs in the background of your system and will scan all your files even if you have not authorized the scan. So, if

Fix 1 – Uninstall Avast Clean

Avast antivirus installs many components alongside the core functionality. Avast cleaning may cause this issue. So, follow the steps below –

1. Launch the Avast Antivirus application.

2. Then, when the app loads, look for the three-column menu at the top. When you click this button, a drop-down menu will appear.

3. Here, click on "Settings" to open Avast settings.

#4. There are many parts and sections to a setting. Now, select the “General” section in the left pane.

5. Then, click "Troubleshooting".

6. Here, just scroll down to find the threshold problem area. Here, click on the “Add/Modify Component” option.

#7. Avast will now load the complete list of components for you.

8. Here, just uncheck the "Clean" tool to remove it from the system.

9. Then, click "Change" to save changes.

#Avast will now uninstall this cleaning tool from your computer. You must close Avast antivirus software from your computer and restart your system.

Now, work on your system for some time and track the CPU, disk usage of Avast. It should drop significantly.

Fix 2 – Update Avast Antivirus

Avast updates antivirus software regularly. They also update virus definitions at steady intervals.

1. Start Avast antivirus software.

2. When opening, click the Three columns button, and then click "Settings" to open it.

3. On the "Settings" page, go to the "General" area.

4. Now, select the “Update” component here.

#5. In the right pane, you will see two different update types. One is Virus Definitions and the other is Avast Antivirus Updates.

6. So, click on "Check for Updates" to check for virus definition updates.

It will check for newer virus definitions. It will automatically download and install virus definitions.

7. Next, click on the other "Check for updates" to updateAvast antivirus software.

This one will look for application updates.

If the updater can detect the newer version, it will automatically download and install it on your system. Restart Avast and test.

Fix 3 - Fix avast

It is possible that Avast is corrupted on your system.

1. Open Aveste Antiphorius.

2. After opening, click the Three columns button, and then click "Settings" to open it.

3. On the "Settings" page, go to the "General" area.

4. Now, go to the "Troubleshooting" section.

5. In the right pane, click "Repair Applications" to repair applications on your computer.

#Now, just leave the system alone for a few minutes and Avast will automatically repair the application.

Fix 4 – Edit Avast Configuration File

There is an Avast initialization file named Avast5.ini in the ProgramData folder. Editing it properly should help.

1. Open File Explorer.

2. There, on the menu bar, click the three-dot button and then click "Options" to open the folder Options.

[If you are using Windows 10, you can directly open the Run box and use it to open Folder Options.

control folders

]

3. Once opened, navigate to the "View" section.

4. Here, just switch the hidden files and folders setting to "Show hidden files, folders and drivers".

5. Finally, click "Apply" and "OK" to save the changes.

6. This will take you back to the File Explorer page.

7. From here, go to this location –

C:\ProgramData\AvastSoftware\Avast

8. Here, look for an initialization file called “Avast5.ini”.

9. Now, right-click on the file and click on "Open with" and select "Notepad" from the list.

#10. Once the file is open, scroll down to the last line.

11. There, Enter this line and press Ctrl S together to save the changes.

[GrimeFighter] : ScanFrequency=999

After saving this change, close everything and restart the system.

Fix 5 – Turn off Mail Shield

Some users pointed out that Mail Shield is the culprit of high CPU usage.

1. Open Avast antivirus software.

2. Then, click the three-column menu and click "Settings".

3. Now, this time, you have to go to the “Protect” tab.

4. Scroll down to the Configure protection settings: page and open the Mail Protection section.

5. Just uncheck the "Enable Mail Shield" box.

6. After clicking the box, a page will open containing "How long should Mail Shield be turned off?

7. Select "Until I open it again".

8. Now, finally, click "OK, Stop ” to complete this step.

9. You will be returned to the Avast settings page again.

10. Now, uncheck all boxes.

Scan inbound emails (POP3, IMAP)Scan outbound emails (SMTP)Add a signature to the end of sent emailsMark in subject of mail containing a virus:Scan attachment when attaching (MS Outlook only)

Once you have done this, close Avast and go to Task Manager. There, note the current resource consumption. You You’ll notice a significant drop in these numbers.

Fix 6 – Remove Avast Add-ons

Avast has many additional features that may not be entirely useful to you. However, with all of this Welfare continues to provide their work and it can become a bottleneck of resources. So if you don’t need these add-ons, you should get rid of these add-ons.

1. You can easily Do this. So, launch it.

2. Now, look at the top of the screen, where you can see the three-column button. Click on it and then tap on "Settings" to open it.

3. Next, click on the "General" area.

4.然后，单击“疑难解答”部分。

5.在这里，您可以看到各种故障排除选项。现在，点击“添加/修改组件”将其打开。

6.现在，逐个取消选中所有这些框，然后单击“更改”以卸载所有这些组件。

File ShieldBehavior Shield Web ShieldMail Shield

之后，等待Avast从系统中卸载所有这些组件。重新启动计算机。

修复7 –重置avast

如果到目前为止没有任何效果，则应将Avast重置为默认设置。这样，Avast将像新的一样好，并且消耗更少的资源。

1. 从系统托盘打开 Avast。

2.然后，单击三栏并打开“设置”。

3.之后，从左侧窗格中选择“常规”。

4.然后，点击“疑难解答”。

5.之后，转到重置所有设置页面。在那里，点击“重置为默认值”选项。

将防病毒软件重置为基本后，检查它是否影响系统资源。

修复8 –卸载Avast（适用于Avast免费用户）

我们的最后一个建议是，如果您使用的是Avast免费防病毒软件，则实际上可以从计算机上卸载该应用程序。Windows 安全中心是 Windows 计算机上的默认防病毒软件。它还提供实时保护和增强的云交付保护。反恶意软件服务可执行文件不会消耗大量资源。您可以尝试几天作为 Avast 的替代品。

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