The seamless and innovative design works so that you don't even know it's there. Will AVG Antivirus slow down my computer? No. You can then remove the files without risking infecting the rest of your computer or mobile device. When the program detects a threat, it alerts you and sets the possibly infected files to the side so you don't open them on accident. How does AVG Antivirus work? AVG runs in the background whenever your computer or mobile device is on. AVG is an easy-to-install, reliable and trusted antivirus and ransomware protection program. Prices vary depending on how many devices you need to cover. AVG Ultimate is $79.99 a year, and AVG Tuneup is $39.99 a year. How much does AVG Antivirus cost? VPN service on five devices is $3.99 a month. What is AVG Ultimate? AVG Ultimate combines internet security, VPN services and computer and mobile device tuneups to create a comprehensive online security package. Many mobile devices already come with this type of security to detect viruses, but PC users could benefit from the extra protection provided by this type of antivirus program. The price point can be a little high compared to other security services in the market, but you can try it free for 30 days. Is AVG good? AVG has a lot of great features that help keep your identity safe and secure on the internet.