While many antivirus suites rely on massive, locally stored signature databases, Webroot uses a cloud-based architecture. This allows version 9.0.21.18 to maintain a tiny footprint—often under 5MB of disk space—while staying connected to real-time threat intelligence.
Because the heavy lifting happens in the cloud, you won't experience the dreaded "system lag" during background updates or active scans.
Enhanced protections in recent iterations of the 9.0 build focus on blocking malicious URLs before they can harvest your data.