Official tools to uninstall antivirus

Avast Software Uninstall Utility 

Avira RegistryCleaner

AVG Remover



BitDefender Uninstall Tool



F-Secure Uninstallation Tool


Malwarebytes’ Anti-Malware Clean Utility


Norton Removal Tool


ftp://ftp.symantec.com/public/english_u ... l_Tool.exe

SuperAntiSpyware Uninstaller Assistant