Run scans, check your defenses, and review detections in one focused desktop app. Microsoft Defender performs detection and remediation; A9 Shield brings its tools into a straightforward A9 interface.
What you can do
Quick, full, and file or folder scans
Live Defender protection and definition status
Detection history and Defender-managed cleanup
Local scan history and exportable reports
What you need
Windows 10 or 11, 64-bit
Microsoft Defender active in Normal mode
Administrator access for scans, updates, and cleanup
Before you download
Preview release: a packaged administrator scan of harmless text passed. Controlled detection and cleanup tests and independent release validation are still pending.
The current executable is unsigned.
A9 Shield uses Microsoft Defender's engine and policies. It does not promise to detect every threat.
Release notes & support
Initial preview: scan controls, live protection status, threat history, definition updates, local reports, and a packaged harmless-file installation validation.
Please include your app version, Windows version, and the steps that led to the issue. Review reports for personal file paths before sharing.
