Anti-virus software components insert themselves deep into the operating systems core where they install kernel mode drivers that load at boot-up and create numerous files, folders, and registry entries in various locations making it more difficult to remove. It is not uncommon for some anti-virus programs to not completely uninstall itself using the usual method of Apps & features in Windows 10 or Programs and Features (Add/Remove Programs) in Control Panel or to result in various errors due to the presence of related services and processes running in the background.
Most anti-virus vendors provide clean-up utilities (removal tools) on their web sites to remove remnants left behind after uninstalling, or for a failed uninstall or failed reinstall. Remnants include related registry entries, files and folders created in various areas of the OS. It's always best to download directly from the vendor's site to ensure you are using the most current version of the uninstall utility as it is not uncommon for third-party hosting sites to have outdated versions which may not work properly.
Comprehensive List of Uninstallers and Removal Tools for Antivirus Software
- ESET: List of Uninstallers (removal tools) for common antivirus software
- Bitdefender: Removal tools (uninstall tools) for common antivirus software
- Antivirus Removal Tool
- List of Antivirus Uninstaller Tools
Edit to add: Microsoft Security Essentials Removal Tool
Edited by quietman7, 11 May 2024 - 02:53 PM.
corrected outdated link