Most consumers do not need to pay an annual fee for third party antivirus software if their computer has Windows 10 installed, and automatic updates are kept on. Windows 10, and 11, has a built-in antivirus program, called Windows Defender. Windows Defender is a pretty good anti-virus program according to Tom's Guide. Installing a third party antivirus software package can actually slow your computer down sometimes. Do make sure Windows Defender is turned on, and kept up to date, and also make sure that your operating system is also up to date. You can do all that by clicking Start > Settings > Update & Security. Also, make sure you are backing up your important files at least twice a year to protact yourself from ransomware attacks, or hard drive failures.