If you are in any doubt, the best thing you can do is contact the 3rd party company directly for further help. All of these programs are outside of Dell's control and are used at your own risk. If you still have problems after using the companies own tool, then there are certain commonly used programs that you may find useful. Using the Windows removal tool (Add/Remove Programs) to completely uninstall these programs is often insufficient. It is considered a best practice to use the application publishers own recommended uninstaller & utility when attempting to totally uninstall a security application, such as an Anti-Virus program. This article lists the most commonly available uninstall tools for you to match your particular needs. Uninstall/Removal tools for common antivirus/security software

Uninstall/Removal tools for common antivirus/security software.

It will also link to some of the Uninstaller software that is in common usage.

This article provides links to 3rd party company websites and their own uninstaller tools.

Avg antivirus removal tool