Hello, This forum is intended to help users with Mozilla products, such as Firefox. As a moderator, I'm going to mark this thread as off-topic lock the thread since it is not a subject covered in the support forum. Please see [[Mozilla Support rules and guidelines]]. Regarding your issue, I would recommend first to make sure Norton and McAfee are not present in the Windows Installed apps list, and if they are not, reach out to the corresponding support services.