reg delete "HKLM\SOFTWARE\AVAST Software" /f reg delete "HKLM\SYSTEM\CurrentControlSet\Services\asw*" /f Delete program files and program data.
Stop and disable Avast services.
avastclear.exe /uninstall "Avast Premium Security" /silent /reboot /log="C:\avast_uninstall.log" The avastclear.exe tool works best when run from Safe Mode (especially for stubborn installations). You can boot into Safe Mode via command line: bcdedit /set current safeboot minimal Method 3: Forced Driver and Service Removal (Advanced) If both standard MSI and Avast Clear fail, you can manually remove Avast’s core components. This is a high-risk method—only use when Avast prevents all other removal attempts. uninstall avast command line
"C:\Program Files\AVAST Software\Avast\Setup\Instup.exe" /uninstall /password=YourPassword Here is a complete batch script that attempts graceful removal first, then falls back to Safe Mode prompt: You can boot into Safe Mode via command
@echo off title Avast Command Line Uninstaller echo Disabling Avast Self-Defense (manual step required) echo Please disable Self-Defense in Avast GUI first. pause echo Attempting MSI uninstall... wmic product where "name like 'Avast%%'" call uninstall /nointeractive pause echo Attempting MSI uninstall