Whatto do if Avast won't install Windows 10?

Avast and Windows are quite compatible. So the best way to resolve compatibility issues between Windows and Avast antivirus is to ensure that you are using the latest Avast version.
Follow these steps to update your antivirus:

1.     Go to the Avast icon on your system tray and open the user interface.
2.     Click on the Settings menu and select ‘Update Program’
3.     When the Avast update is done, restart your Windows system
 
If you have any other queries related to the compatibility of Avast you can contact Avast customer care number .