First, switch on your system and choose any of the web browsers that you prefer by clicking on the respective icon.
Then, go to the navigation or search address bar to begin with, the Avast Download process by opening the official website of Avast.
For this, you will have to visit the page 'www.avast.com.'
Hence, type the web address 'https://www.avast.com/en/-us/index' in the address bar.
Hit the enter button from the keyboard after performing the aforementioned step.
As a result, the Avast official website will load.
The first page on its website will first determine your system's operating system as soon as it opens.
After that, you will find a button depicting 'download free antivirus' on the page.
Hence, proceed to click that button.
Remember, the button will be in orange color. It will show up in the middle of the page.
As soon as you tap on the 'download free antivirus' button, it will take you to the Avast Download page.
Here, you will have to choose the correct Avast Download file as per your computer's operating system.
If you are using the Mac, then the option will depict 'free download.' Hence, you are recommended to click on that option.
Remember, this button will show up in green color on the page's top.
Now, you will have to wait until the process of Avast Download begins.
The setup file of Avast will download automatically on your system within 5 seconds on the download page.
If the Avast Download does not begin after 30 seconds of waiting or so, then click on the 'restart it here' link.
You will find the respective link in the center of the page.
Now, you must open the Avast setup file. To do this, have a double-click on the Avast EXE file in the case of Windows.
If you are using the Mac, then you have to hit the DMG file.
As a result, the setup window will launch.
You can find the downloaded files at your system's default download location.
Now, you have to follow the prompts for the installation of Avast. The process as per Mac and Windows varies.