Which versions are no longer supported?

Support is discontinued for versions 19.1 and later of the following products: Avast Premium Security (previously Avast Premier), Avast Free Antivirus, Avast Omni, Avast Pro Antivirus, Avast Internet Security that are running on Windows XP or Windows Vista. These versions are supported on PCs running Windows 7 or newer.

Which versions are still supported on XP and Vista?

Versions 18.8 and lower of the following products: Avast Free Antivirus, Avast Pro Antivirus, Avast Internet Security, and Avast Premier are still supported on Windows XP and Windows Vista.

People using older versions of Avast Antivirus on Windows XP or Windows Vista will continue to receive virus definition updates and be protected. However, we recommend upgrading to the newest versions of Windows and Avast Antivirus to benefit from the best detection rates and newest features available.

How can I update the program version?

If you are using an older version of Avast Antivirus on Windows XP or Windows Vista and you want to update the program version, you first need to update your Windows XP or Windows Vista operating system to Windows 7 or newer. To upgrade to Windows 7 or newer and install the latest Avast Antivirus program version:

1. Install Windows 7 or newer by following the instructions on Microsoft Support:
   • Microsoft Support ▸ Install Windows 7 Service Pack 1 (SP1)
2. Uninstall your version of Avast Antivirus. For instructions, refer to the following article:
   • Using the Uninstall Utility for Avast Antivirus
3. Install your preferred Avast Antivirus product:
   • Installing Avast Free Antivirus
   • Installing Avast Premium Security
4. If you installed Avast Premium Security in the previous step, you also need to activate it, as it is a paid product.
   • Activating Avast Premium Security

For detailed instructions on how to keep your Avast Antivirus program version up to date, refer to the following article:

• Updating Virus definitions and Avast Antivirus Program version

If you are unable to update your Avast antivirus product using the steps above, contact Avast Support.

Why should I update the program version?

People using older versions will continue to receive virus definition updates and be protected. However, we recommend upgrading to the newest version to benefit from the best detection rates and newest features to date. This update is also recommended because the latest version is compatible with Microsoft Windows 10.

Why are older versions no longer supported?

Over the years, Avast engineers have improved our database of known virus definitions, the mechanism in which zero-day and widespread malware are detected, and the frequency of streaming updates sent to our customers. The latest Avast Antivirus is our best performing security product yet.

Please update your PC to a supported operating system so you can benefit from the enhanced features and higher detection rates that protect your computer from malicious attacks with the latest Avast Antivirus version. This update is also recommended because the latest version is compatible with Microsoft Windows 10.

Keeping Avast Antivirus up to date gives you the best protection and the smoothest user experience. Among the advantages:

• Better detection rates
• Easier technical support
• Fewer bugs and problems that still might exist in older versions
• Further program updates to ensure the best protection for your PC

Can I still receive virus definition updates on versions that are no longer supported?

Yes - People using older versions will continue to receive virus definition updates and be protected. However, we recommend upgrading to the latest versions of Microsoft Windows and Avast Antivirus to benefit from the best detection rates and newest features available.

Can I contact Avast Support when I am using a version that is no longer supported?

Avast support will ask you to update your operating system to Microsoft Windows 7 or newer before we can assist you with Avast Premium Security, Avast Free Antivirus, Avast Pro Antivirus, Avast Internet Security, or Avast Premier versions 19.1 and later.

What if I continue to use a version of Avast Antivirus that is no longer supported?

People using older versions will continue to receive virus definition updates and be protected. However, we recommend upgrading to the newest version to benefit from the best detection rates and newest features.

If you prefer to run Avast Antivirus on Windows XP or Windows Vista and require technical support, our support team will ask you to update to Windows 7 or newer before we can assist you with version 19.1 and later.