Keeping your computer updated should be top priority. This applies to all applications on your computer as well as Windows updates. Windows updates are constantly patching security vulnerabilities that could even slip by antivirus software if automatic updates are disabled.  Always password protect your PC. Choose passwords you that are memorable, like phrases. The longer and more complex, the better. Ensure that antivirus is enabled on your computer. Built-in Windows Security is adequate for most home users. Free and paid antivirus is no good if it’s expired. Many users “install and forget” 3rd party antivirus, leaving their computers vulnerable.