Guardian Total Security. If you are using the build version 10.0.35.1, you need to upgrade to the latest build, before installing the offline updates. To check the build version installed on your system, follow these steps: Open Guardian Total Security. On the top right, click the Help menu and select About. Bullguard Antivirus 2019 has a cutting-edge multi-layered defense system, an improved vulnerability scanner, and safe browsing alerts to keep all malware out so you can enjoy a fast and clean PC. Free Download.