If you uninstalled Avast antivirus from your computer using Programs and Features or from Add/Remove Program in Control Panel, you should know that Avast Uninstaller uninstalls the program but leaves behind some Avast-related files and registry entries on your computer, you can use Revo Uninstaller’s Advanced Uninstall Option to fully uninstall Avast including remaining files on your hard drive and registry, otherwise you can also do the same thing using Avast Cleanup Toolthis tool is unofficial.
Don’t be confused by the name if you are looking for an official Avast tool that removes Avast from your computer when you failed to remove it from Control Panel, here is the tool you are looking for.
Using the Avast Cleanup Tool is quite simple, download the program’s zip file, extract its contents to a folder and run the Avast Cleanup Tool executable, accept the terms and the tool does the cleaning work.
Some antivirus may flag this tool as malware, it is a false positive.
By using Avast Cleaner Tool, you can remove unnecessary files and registry entries left on your computer by Avast Uninstaller after uninstalling Avast from Control Panel.