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Free antivirus was just the beginning.
Introducing Avast One

Avast One includes the best free antivirus with advanced protection to help you safeguard your privacy, connect securely, speed up devices, and stay safe from cybercrime.

All this is completely free.

Avast Free antivirus is the worlds most trusted and used antivirus product for basic internet protection. If you require high-level protection with VPN and a more advanced level of security then please contact us for assistance.

Free Support for Avast users

If you need help then look no further.

Avosec has been helping Avast customers for over 20 years.

We know our stuff!

Installing Avast One Free Antivirus

Avast One Free Antivirus for Windows is an essential security application that prevents viruses, spyware, and other malicious threats from infecting your PC.

This article contains instructions to download and install Avast Free Antivirus.

Install Avast Free Antivirus
Click the button below to download the Avast Free Antivirus setup file, and save it in a familiar location on your PC (by default, downloaded files are saved to your Downloads folder)

Right-click the downloaded setup file avast_free_antivirus_setup_online.exe and select Run as administrator from the context menu.

NOTE :If you do not see the Run as administrator option, refer to the following article for instructions to manage administrative accounts on your PC:
Managing administrative accounts on your Windows PC
If prompted for permission by the User Account Control dialogue, click Yes.

To change the default setup language, click the current language in the top-right corner of the screen. Then, click Install to proceed with the default installation, or click Customize if you need to make changes to the default setup.

Wait while setup installs Avast Free Antivirus on your PC.

When the installation is complete, click Continue.

Click Run first scan to start a comprehensive Smart Scan, which detects viruses, malware, bad browser add-ons, and other issues on your PC.

Avast Free Antivirus is now installed on your PC and ready to use, but some components may not fully function until you restart your PC.

It is no longer necessary to register Avast Free Antivirus, as your initial free subscription automatically activates after installation.

Still, need help?
If you experience any installation issues:

Ensure your PC meets the minimum system requirements and your Windows is up-to-date.
Windows 11 except Mixed Reality and IoT Edition; Windows 10 except Mobile and IoT Edition (32 or 64-bit); Windows 8/8.1 except RT and Starter Edition (32 or 64-bit); Windows 7 SP2 or higher, any Edition (32 or 64-bit)
Windows fully compatible PC with Intel Pentium 4 / AMD Athlon 64 processor or above (must support SSE3 instructions); ARM-based devices are not supported
1 GB RAM or above
2 GB free space on the hard disk
Internet connection to download, activate, and maintain program updates and antivirus database
Optimally standard screen resolution no less than 1024 x 768 pixels

Check that the downloaded setup file is not corrupted. For instructions, refer to the following article:
Troubleshooting installation errors caused by corrupted setup files
Uninstall any previous antivirus software from your PC. For instructions, refer to the following articles:
Uninstalling other antivirus software
Using the Uninstall Utility for Avast Antivirus

Restart your PC, then try to install Avast Free Antivirus again by following the exact steps in this article.
If the issue persists, contact Support For instructions.