Today's security software keeps viruses away, protects against malware and spyware, and sometimes offers a VPN and password manager. On your computers and laptops, but don't forget your mobile and tablet!
Make sure you have regular backups with version history? And make sure your backup software also offers protection against ransomware! These days, a virus will first try to disable your security, then your backup will be affected. Use Acronis for a backup with ransomware protection and version history that allows you to restore in an emergency. Finally, the latest version of Windows 10 is the only way to stay safe.