Original sentence: For example, McAfee requires one to unsubscribe at least 60 days before the expiration of the present subscription.In that case, the subscriber may contest the charges with the credit card issuer, but this recourse is likely to fail if in fact the subscriber had authorised such a "continuous payment authority"
Edited sentence: (You can also call your bank and advise that there is no way to unsubscribe yourself, and by law they can cancel the payments due to fraud.For example, McAfee requires one to unsubscribe at least 60 days before the expiration of the present subscription, yet it does not provide phone access nor a way to unsubscribe directly through their website.In that case, the subscriber's recourse is to contest the charges with the credit card issuer.Simply training users in safe computing practices (such as not downloading and executing unknown programs from the Internet) would slow the spread of viruses and obviate the need of much antivirus software.Such recourse is likely to fail if in fact the subscriber had authorised the direct debit.The spread of viruses using e-mail as their infection vector could be inhibited far more inexpensively and effectively, without the need to install additional antivirus software; if bugs in e-mail clients, which allow the unauthorized execution of code, were fixed.They can do this as if there is no way to stop the payments by contacting the company directly then this is classed as fraud in the UK.This is not always obviously stated in terms of usage for these programs.Thus cancelling the credit card is the only option for a subscriber who cannot cancel the automatic billing.User education can effectively supplement antivirus software