How To Fix ‘Avast Service High CPU’ Usage

Millions of people use and trust Avast Antivirus. The company did not see that services provided by them use the very high CPU in earlier times. Many people complained about the Avast Service High CPU Usage.

Which made the company and other technicians look into the problem and find a suitable solution. Some of the solutions are suggested below.

Avast Service High CPU Usage in Windows 10


How to Fix Avast Service High CPU Usage

Also Read:

  1. Plugged in Not Charging
  2. SppExtComObjPatcher.exe
  3. The Active Directory Domain Services is Currently Unavailable

Method 1 – Update Avast Antivirus

Many times any outdated version of any system can create problems. Similarly, the last version of Avast can create problems in the functioning; for example, old versions of Avast can become unresponsive, and it’s recommended to always keep both the Antivirus and the virus definitions database up to date in order to keep them running successfully.

Follow the below steps to achieve this:

Step 1: Firstly, the user has to open the Avast “user interface” by clicking its icon at the system tray, or the user can find that by locating it on the device “Start menu entry.”

Step 2: The user needs to navigate to the Update tab, where they will notice that there are two update buttons. One button is related to the update of the “virus definitions” database, while on the other side, another button is an automatic update of the program.

Step 3: Many users have stated that updating the virus definitions have resolved the problem. But for the long term profit, it is for the best to update both the database and the Antivirus program by clicking on both of the update buttons, all the users’ needs have to be patient for a while till Avast checks for any updates and then the user needs to follow the instructions given on the screen for going through the process and the solution.

 Step 4: Finally, all the users need to check to see if Avast Service High CPU Usage has gone back to normal or not.

Method 2 – Remove Avast Clean-up

The component which creates the problem of Avast Service High CPU is Avast Clean-up, which acts during real-time for the freedom of some resources distributed by other background apps in the user’s device.

Whatever that does, its job during real-time can be heavy on the processor, so it is for the better to uninstall those components. To remove the Avast clean-up, the following Steps would help the user to do so:

Step 1: The user has to open the Avast user interface by clicking on its icon at the “system” tray then press the “Start menu”.

Step 2: The user then has to navigate to “Settings” to click the “Components.”

Step 3: Then, the user has to click on the downward-facing arrow next to the component or feature which the user wants to remove. Then by clicking Uninstall Component, and finally click on OK” to confirm the uninstallation of the component. That would cause the system to uninstall the unwanted component for the user.

 Step 4: After that Step, the user has to “Restart” their PC if Avast prompts with an option for the “confirm of the changes,” then the consumer would need to confirm it.

 Step 5: Lastly, the user needs to check and see if the Avast Service High CPU Usage has gone back to normal or not.

 Method 3 – Use Command Prompt

Command Prompt is one of the most powerful tools in Windows. This solution would disable the background checks, and it will only monitor once in a while after this solution is applied.

The solution is quite simple, and it will change the Scan Frequency to its maximum value. The process sometimes causes some security problems, but it’s always guaranteed that the CPU usage will go back to normal. The following Steps are used to use Command Prompt:

Step 1:  the user has to use “Windows Key + X key” for opening the menu where they should find and select the “Command Prompt (Admin) option. (Another way, the user can right-click on the Start menu for the same or can simply search for Command Prompt)right-click” on it andselect Run as administrator.”

Step 2:  By typing the following command to navigate the following folder where the user will be able to execute further actions:

C:\ ProgramData\AvastSoftware\Avast

 Step 3:  After the last Step, the user needs to open the “avast5.ini” file and “insert.”
( or type) the following command in line:

“[GrimeFighter] : ScanFrequency=999”

Step 4: After all the above Steps, the user needs to save the file. Restart their computer and check that the Avast Service High CPU Usage error is resolved immediately.

Method 4 – Remove Unnecessary Avast Add-ons

Sometimes the Avast app becomes too heavy with other additional quirks and features that increase its functionality. However, for most users, these features are not needed, and they add to the resource usage by the Antivirus.

Therefore, this solution will be resting the Avast installation by uninstalling some of these features to solve the problem of Avast Service High CPU Usage. The following Steps will help the users to do so:

Step 1: The users need to press “Windows + R” for opening the Run prompt.

Step 2: Then, the user needs to type “Control Panel.” After that, press “Enter” for opening the classical control panel interface.

Step 3: After that, they need to click on the “View by:” option and go to “Category.”

Step 4: Now, the next thing is to click on the “Uninstall a Program” button under the “Programs” head.

Step 5: After that, the user needs to do is right-click on the “Avast Antivirus” option in the list and select “Uninstall.”

Step 6:  The users need to wait for the request to process. Also, let the window open, after which they need to click on the “Modify” option.

Step 7: In the next window, the users need to uncheck all the unnecessary options except:

  • File Shield
  • Mail Shield
  • Web Shield
  • Behaviour Shield

Step 8: Then, the user needs to click on the Change button and wait until the installation is completed.

Step 9: Finally, the user had to check and see if the Avast Service High CPU Usage issue still exists.

Method 5 – Stop Avast Screensaver Process

In some cases, it is the Avast Screensaver, which continues to function even though the screen saver is not being operated. Even though it doesn’t happen all the time, but can run for enough time to cause the problem of Avast Service High CPU Usage for nothing.

There are Steps that would help you to solve the problem.

Step 1: The user has to right-click any “random file,” which is located on their computer and choose to “scan” the file with “Avast.”

Step 2:  The scan result will pop up on the user’s device, which will show the user a list of scans that are currently running on the device.

Step 3:  Finally, the user has to locate the Avast Screensaver scan and click the Stop button next, which will stop the unwanted performance.

Step 4: Lastly, the consumer has to check and see if the CPU usage has gone back to normal.

These Steps should solve the Avast Service High CPU Usage problem of the screensaver.

Method 6 – Repair Avast From Control Panel

Sometimes somethings may go wrong with the Avast installation, and for safety, it should simply get repaired by going to the Control Panel and repairing it. This solution worked for plenty of users. It is always safe for the user to readjust the settings and restart their computers.

Step 1: Firstly, the user needs to be logged in with an administrator account as they won’t be able to delete unwanted programs by any other account.

Step 2: The user can progress by clicking on the “Start menu” and then opening the “Control Panel.”

Step 3: In Control Panel, the user needs to “select the View as Category at the top right corner.”

Step 4: After that, they need to “click on Uninstall a Program under the Programs section.”

Step 5: If the users are using the Settings app, then clicking on Apps, they should open a list of all installed programs on their computer PC.

Step 6: After that, they need to Locate Avast in Control Panel or Settings and click on “Uninstall/Repair.”

Step 7: The uninstall wizard should open with two options: Repair and Remove. Users can select Repair and click Next in order to fix the installation of the program.

Step 8: A message will pop up on the user’s screen, asking to confirm the process. The system will most likely restart with the default settings, which worked before the problem started to occur.

Step 9: Finally, after clicking Finish when the uninstalled completes the process, and the user needs to restart their computer to see whether Avast Service High CPU error still appear or not.

Method 7 – Disable Mail Shield

Sometimes, the Mail Shield feature of Avast on the devices can hinder the performance of the system and can cause high CPU usage. Many have neglected this component of the system, which causes the problem.

The following are the Steps that can help the user’s overcome Avast Service High CPU Usage problem:

Step 1: First, the user needs to launch the Avast from the system tray and click on the “menu.”

Step 2: Then, they need to select the “Settings” option and click on the “Protection.”

Step 3: In the protection tab, the user has to select the “Core Shields” option and scroll down to click on the “Mail Shield.”

Step 4: The user needs to uncheck every option in this tab and click on “Indefinitely” if Avast asks for a time period.

Step 5: After this, finally, the user has to restart Avast and “check” to see if the Avast Service High CPU Usage issue persists.

Method 8 – Disable Updater Notifications

In some cases, the Avast Service High CPU Usage might be provoked if the Antivirus is trying to send an update notification. However, it is getting blocked due to which this problem is taking place.

Therefore, this solution will be helping in disabling the updater notifications. And the following Steps would help the user to disable them:

Step 1: The user needs to open Avast and wait for it to load completely.

Step 2: Then, they need to click on the “Menu” icon on the top right side and select “Settings.”

Step 3: When the settings are open, the user needs to click on the “Performance” tab from the left panel. Then go to the “Software Updater.”

Step 4: In the software updater setting, the user needs to uncheck the “Notifications about new Updates” button. Then click on “X” to close the window.

Step 5: Now, lastly, the user needs to “check” and see if the Avast Service High CPU Usage issue is there or not.

Also Read:

  1. System Interrupts
  2. Steam Disk Write Error
  3. 0x8024200D
  4. Video TDR Failure


Avast is undoubtedly one of the most popular free antivirus software. However, it demands high CPU resources that can be annoying. Now with the help, all the above solutions users know how to fix Avast Service high CPU usage problem.