It’s a good option because you can install it on as many devices as you want, and it’s free to use. Avast Free Antivirus is a popular choice for those on a budget, as it has an extensive database of antivirus definitions that’s updated automatically through the internet. Many security software makers offer the core protection of antivirus for free but lock away the advanced features and extra tools they charge for. Related: How to Stop DDoS Attacks During Online Gaming? Although Windows includes a security suite, third-party security suites can offer more protection against viruses, malware, PUPs, and adware. Whether you’re running a new Windows PC or want to update your existing one, you should consider using a free antivirus program. Most leading security companies offer free security products to protect your PC from many common threats.