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Troubleshooting app conflicts when installing Avast One

This article is about the new version of Avast One. For information about conflicts during the installation of the old Avast One, refer to the following article: Avast One - FAQs.

The new version of Avast One provides access to multiple Avast apps through a single, unified interface. Since the apps available through Avast One are also offered as standalone applications, they cannot be installed at the same time due to compatibility restrictions. This article explains how to resolve common installation conflicts.

Conflicts while installing standalone Avast apps

If you attempt to install a standalone Avast app, such as Avast Free Antivirus, Avast Premium Security, Avast SecureLine VPN, Avast Cleanup, or Avast BreachGuard, while Avast One is installed, the installation will be blocked.

To resolve this, refer to the following options:

Conflicts while installing Avast One

If you attempt to install Avast One while having a standalone version of Avast Free Antivirus, Avast Premium Security, Avast SecureLine VPN, Avast Cleanup, or Avast BreachGuard, the installation will be blocked.

To resolve this, you must uninstall the standalone version of your app, then install Avast One. For detailed instructions, refer to the Uninstalling standalone apps section below.

Uninstalling standalone apps

The following applications should be uninstalled before installing the new Avast One:

After uninstalling these apps, you can install the new Avast One and activate your apps through it. For instructions, refer to the following article: Installing and Activating Avast One apps.

Avast Free Antivirus is included in Avast One by default. You can also install the free versions of Avast BreachGuard and Avast Cleanup by following the steps described in these articles:

The new version of Avast One provides access to multiple Avast apps through a single, unified interface. Since Avast Antivirus is included with Avast One by default, it is not possible to use standalone versions of Avast Security or Avast Premium Security alongside it. This article explains how to resolve these installation conflicts.

If you have separate, paid subscriptions for Avast Cleanup Premium or Avast SecureLine VPN you can continue using them without interruption. However, we recommend activating these apps through Avast One for a more integrated experience.

Conflicts while installing standalone Avast apps

If you attempt to install Avast Security or Avast Premium Security, while Avast One is installed, the installation will be blocked.

To resolve this, refer to the following options:

Conflicts while installing Avast One

If you try to install Avast One when you already have Avast Security or Avast Premium Security installed on your Mac, the Avast One installation is blocked due to a conflict with your existing Avast app.

To resolve this, you must uninstall the standalone version of the Avast Antivirus, then install Avast One. For detailed instructions, refer to one of the following articles:

After uninstalling the standalone app, you can activate Avast Premium Security through Avast One: Installing and Activating Avast One apps ▸ Activate Avast One apps.

Conflicts with the old Avast One

The new version of Avast One is not compatible with the previous version of the application. If you wish to use the new version of Avast One, you must first uninstall the old version and vice-versa. For detailed instructions, refer to the following articles:

Conflicts with third-party apps

Avast One is not compatible with other antivirus apps. Before you uninstall Avast One, you must uninstall any other antivirus apps from your Windows device. For instructions on how to uninstall other Antivirus apps, refer to the following article: Uninstalling other antivirus software.

  • Avast One
  • Windows and macOS


Updated on: 28/10/2025

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