McAfee: how bad is the worst antivirus? https://www.youtube.com/watch?v=PkLGvRNVUC0

To Help deal with large amounts of spam you may like to try this free program: Mailwasher

Unsubscribe From Emails in One Click Using Trimbox - Trimbox is a free browser extension that lets you unsubscribe from unwanted mailing lists in just one click. Trimbox

Reduce the amount of Spam you recive in Gmail - Use Strict Spam Filter Settings. And create filters in Gmail by clicking the Settings icon and See all settings > Filters and blocked addresses > Create a new filter.