1. Microsoft Built in Protection
(Learn/Antivirus)

... program—is open to attack from viruses, worms, and Trojan horses. Some of its features may remove or prevent some malware from installing, but they don’t protect like a dedicated antivirus solution. On ...

2. Norton Antivirus
(Norton Software/Security)

... prevent fast-spreading Internet worms from getting on to your PC. Engineered for Speed IMPROVED! Proven fastest antivirus solution for protection that won't slow you down, get in your way, or swallow ...

3. Norton 360 Version 3
(Norton Software/Security)

... and more in one complete, fully automated solution. Provides industry-leading security without slowing you down – Runs fast and uses less memory than competing programs, so you won't sacrifice performance ...

4. Norton Internet Security
(Norton Software/Security)

... hackers, and more in one complete, fully automated solution. Provides industry-leading security without slowing you down – Runs fast and uses less memory than competing programs, so you won't sacrifice ...