You've probably heard of Bitdefender, and with good reason. This one's a heavyweight in the antivirus world, protecting over 500 million systems in more than 150 countries. Wow, right? I read a review once that said, "Bitdefender is the silent guardian I never knew I needed." This is partly because Bitdefender offers multi-layered protection against ransomware - a particularly nasty type of malware that encrypts your data until you pay a ransom. Its protection rate in the latest AV-TEST was an incredible 99.9%. And while there are reports of the occasional false positive, Bitdefender remains a top pick for robust and reliable antivirus protection.