If you wont to uninstall avast antivirus from window 10 and you don't know how to uninstall it don't worry there are some easy steps help you to uninstall the avast antivirus from window 10 follow this steps to uninstall avast antivirus
:-login to your window 10 with all administrative permission
:-then launch your preferred web browser and visit the avast website click on the download button
:-following that you've the right click action on the download setup file to select run administrator
:-as you do so a dialogue will pop up in front of you to ask whether to you want to continue
