If your budget is $0, you may need to look at alternatives to Avast that offer free server components, although, again, this is rare in 2026:
Do you have a for paid security, or are you strictly looking for free?
Using a consumer-grade antivirus (like Avast Free Antivirus ) on a server is inefficient and risky. A dedicated (like Avast Business Antivirus) provides:
An open-source, completely free option. However, note that ClamWin lacks on-access (real-time) scanning, meaning it only scans files when you tell it to.
Surprisingly powerful and already installed on Windows Server. It provides solid real-time protection.