Amazon/ZDNET It’s never a bad idea to add an additional layer of antivirus protection to your computer, particularly when threats like malware, phishing, ransomware, and more continue to rise and grow more sophisticated. Right now, you can get a year of Norton 360 Premium — one of our favorite, most trusted brands — on sale for just $30, down from the original price of $100, during Amazon’s Big Spring Sale.  Also:  The best antivirus software to protect your computer in 2026 This Norton 360 Premium deal is for a digital download, which you can install on up to 10 PCs, Macs, iOS, or Android devices.…