Microsoft's built-in antivirus program that is now known as Windows Security, doesn't require the purchase of a subscription or installation, so it offers a lot of value for no cost. The product is highly recommended by the top AV testing labs all over the world. It offers an effective malware defense without affecting performance. It also offers a variety of useful features, including ransomware protection and a password manager. However, it lacks certain essential features that are found in more premium antivirus suites, and it isn't the easiest of choices.

Virus and threat protection includes the usual quick, full and custom scans as well as an extensive offline scan mode to combat difficult-to-remove threats. The firewall and network module is simple to use, but not as comprehensive as other products. The main drawback is that it protects only Windows devices. If you're looking to secure your Android or Mac phone, you'll have to look for another option.

Family options include parental controls and the ability to monitor the health of the devices in your family. There's a password manager which is hidden within the Edge browser, and it can sync to your other devices. The drawback is that you cannot control the features from the app and have to make use of a browser to manage these features.

In contrast to other antivirus programs it doesn't connect to the Windows kernel - a method that can open new areas of attack for black hats and possibly compromise your operating system. It also offers good behaviour detection why not find out more and stops users from accidentally downloading malicious files.