Before installing Avast Omni, Avast Premium Security, or Avast Free Antivirus, you must first ensure that no other antivirus applications (including expired or trial versions) are installed on your PC. When multiple antivirus applications are installed on one PC, conflicts such as false-positive detections, performance degradation, and system instability occur.
It is only possible to use Avast Antivirus alongside another antivirus application if Avast Antivirus is running in passive mode. For more information, refer to the following article:
The following links direct you to the websites of other antivirus software providers for uninstallation instructions. Avast is not responsible for any of the content on the linked web pages. If the antivirus program you are trying to uninstall is not in the list, refer to the application's support website.
It is not possible to uninstall Microsoft Windows Defender. However, Microsoft Windows Defender disables automatically to allow Avast Antivirus to install correctly.
Before installing Avast Omni, Avast Premium Security, or Avast Security, you must first ensure that no other antivirus applications (including expired or trial versions) are installed on your Mac. When multiple antivirus applications are installed on one Mac, conflicts such as false-positive detections, performance degradation, and system instability occur.
Uninstall other antivirus software
The following links direct you to the websites of other antivirus software providers for uninstallation instructions. Avast is not responsible for any of the content on the linked web pages. If the antivirus program you are trying to uninstall is not in the list, refer to the application's support website.
