Leverages cloud-based AI to recognize spoofed banking portals or malicious checkout pages, blocking web scripts from forcing drive-by downloads.
This particular version was notable for a few key reasons: How to Stay Protected Safely 4
Scans your home network for vulnerabilities to prevent unauthorized access. and sensitive folders from unauthorized modification.
Unofficial builds (Build 21.11.6809.528) are often modified, which can lead to system crashes or high CPU usage because the background processes aren't running as intended. How to Stay Protected Safely How to Stay Protected Safely 4
4.5/5
For the most reliable protection, it is better to use the directly from the official Avast website , which includes the latest 2026 security definitions and fixes for the bugs found in the 21.11 build. Avast | Download Free Antivirus & VPN | 100% Free & Easy
: Walls off personal photos, documents, and sensitive folders from unauthorized modification.