With online threats and scams becoming ever more common, you need to defend yourself. That’s why we strongly recommend that you run antivirus software on your computer. Luckily, Amazon is running a deal on Norton 360 Premium that saves you 80% off the retail price.

While Amazon has been selling Norton Premium 360 for $30 ahead of Black Friday, the one-day sale knocks another $10 off for a year subscription to the service. You’ll get a license good to protect up to 10 devices — PCs, Macs, and iOS and Android devices — and real-time virus protection when you register a new account with Norton.

Compared to other versions, Norton Deluxe only offers coverage for either three or five devices depending on which version you purchase, and the Standard version only a single device. If you have a lot of devices or have a family to protect online, we’d recommend the Deluxe version, and especially at this price.

There are no limits to each type of device you can protect, so if you need to protect 10 computers you can, but you could also protect 10 smartphones just the same.

Premium 360 does offer some additional attractive features over and above most standard virus protection offerings. Norton includes 75GB of free cloud backup space to give a secure space for important documents in the event of theft or loss, and secure VPN service is included so you can browse the web anonymously and keep your data safe.

Thanks to the acquisition of LifeLock several years back, Norton Premium 360 also includes free dark web monitoring, which monitors and alerts you when your personal information is found on these channels. As the name suggests, you are protected online in just about every way possible.

If you’re wondering, Norton 360 Deluxe renews annually at anywhere from $100 to $140 depending on what cloud storage space option you choose (this particular offer will renew at $100 yearly). You can always cancel at any time, although you will need to enter a payment method at the time of activation.

Amazon does offer an instant download option, so why not take a moment between your Black Friday shopping to install antivirus software that will make sure you’re filling up your online shopping carts both safely and securely.

Looking for other great Black Friday computer deals? Be sure to check out our roundup.