If you prefer to use Avast as antivirus protection, you must remove existing antivirus software from other vendors before trying to install Avast. If you have one already, do not install Avast because it’s not recommended to use more than one antivirus program. If Avast still won’t install, make sure that there’s no other antivirus program installed on your computer. Proceed to install Avast by opening the setup file from the folder.
Move the setup file of Avast in the Avast Installer folder that you just created. An example would be: open “ My Documents” folder > create a new folder and name it as Avast Installer. Do not panic but solve it by moving the setup file to another location in your hard-drive. If you just downloaded the setup file of Avast from their website or an alternative download server such as or, but you received a message that the file is not a valid win32 application, when installing Avast. The install process of Avast! is straight-forward, but if you have a problem installing the program in Windows PC, try the possible solutions below and only use Avast removal tool as last resort of action. The setup of Avast comes with an uninstaller and repair utility that should help in fixing installations problem.
What to Do If Avast Antivirus Won’t Install?Īvast! Home edition from Alwil is a free antivirus protection for Windows, Linux, Mac and PDA.