It's worth noting that this isn't just a Windows phenomenon – Mac, iOS and Android devices are also at threat which is why a good antivirus software will cover more than one device on a plan. But there are still holes here where a dedicated antivirus program can offer more security. Sure, Microsoft does throw in Defender with Windows 10 and this now works better than ever, offering some serious protection minus the cost. The best antivirus software on your machine means your banking details are kept private, your emails are not shared and any other personal data is kept between you and only those who you choose to share it with. To keep them tucked away safe and private, the best antivirus software works to fight blackmailing, identity theft and more so you don't have to worry about being exposed online. The best antivirus software keeps you safe online and by you that means your digital self – you know, the one that has all your banking and personal details stored.