Choosing the right antivirus software package for you means knowing your needs. For many, a simple free package that handles the basics is fine, while others benefit from more in-depth protection.
Packages such as Norton AntiVirus and Bitdefender Total Security are great for those with multiple devices running different platforms. They want a one-stop-shop covering everything with a single license. These packages do much more than offer protection against malware and add essential security features such as password managers, file shredders, ransomware protection, VPNs, parental controls, and much more.
The makers of these security suites offer a free trial, and it might be a good idea to make use of this, so you can see whether the software fits in with your workflow. Some people can find that certain packages deliver security information annoying, while others want it to be noisy and inform them of everything that happens.
This also allows you to discover for yourself what the performance hit of running the software is like.
For Windows users who don't want to mess about with subscriptions or risk their protection running out at some point, I believe that Microsoft Windows Defender Antivirus -- built-in to Windows 10 and Windows 11 -- is the perfect solution.
Also: The Windows 10 security guide: How to protect your business
Whatever you choose, I recommend that you download from a reputable source -- either the official website or an official download source such as Apple App Store or the Google Play Store.
Shady third-party sites are the perfect place to catch malware!