Protect your PC,
quietly and reliably.
ShieldGuard is an antivirus for Windows combining multi-layer detection (hash matching, YARA rules, and heuristics) with real-time monitoring. Built in Rust, it stays out of your way while it works.
Three products to protect your PC and network.
Use them alone or together. Each is a one-time purchase from $6.25.
ShieldGuard
Endpoint protection combining hash matching, YARA rules, and heuristic analysis with real-time monitoring and a quarantine vault.
ShieldGuard EDR
A background agent that detects and alerts on suspicious changes or deletions to files and folders you protect in real time. Detection- and alert-focused, with no exaggerated claims.
ShieldGuard NET
Scans devices and routers on your home private network for known vulnerabilities (CVEs) and end-of-life models. Designed so it cannot scan networks other than your own.
Every layer of defense, in one app.
From detection to real-time monitoring, quarantine, and ad blocking — everything you need for security in a single application.
Multi-Layer Detection Engine
Combines SHA-256/MD5 hash matching, 19,000+ YARA rules, and heuristic analysis to detect known and unknown threats from multiple angles.
Real-Time Monitoring
Detects changes to designated folders in real time and warns you of threats immediately.
Quarantine Vault
Detected files are encrypted with AES-256-GCM and quarantined. Easy to restore in case of a false positive.
Ad & Malware Blocking
Blocks connections to ad and malware-serving sites at the DNS level.
English & Japanese UI
From settings to alerts, the entire interface is available in natural English or Japanese.
Lightweight & Fast
Built in Rust to keep CPU and memory usage minimal while running in the background.
Clear, no-guesswork design.
See your protection status at a glance on the dashboard. Drag-and-drop scanning is also supported.
Simple pricing.
One-time purchase. No additional subscription fees. Payment by credit or debit card (via Stripe).
Your license key for has been issued. The key below has also been sent to .
Download (.exe)- Multi-layer detection (hash, YARA, heuristics)
- Real-time monitoring & quarantine vault
- Ad & malware blocking
- English & Japanese UI
- Real-time tamper/deletion detection on protected paths
- Detection- and alert-focused (no kernel-level blocking)
- Tamper-detection watchdog (best-effort)
- English & Japanese UI
- Scans only your own home network (other networks are out of scope)
- Detects known vulnerabilities (CVE) & end-of-life models
- Read-only scanning (no exploitation or credential guessing)
- English & Japanese UI
Frequently asked questions
Which operating systems are supported?
Windows 10 / 11 (64-bit). macOS and Linux versions are not currently available.
Is there a free trial?
A trial version is currently in preparation. If you'd like one, please contact us via the form.
How is the virus definition database updated?
You can fetch the latest detection data from within the app or via the included command-line tool. An internet connection is required.
What if I want to use it on multiple PCs?
Each license covers one PC. If you use multiple PCs, please purchase a license for each.
Do I need to buy all three products together?
No. ShieldGuard, ShieldGuard EDR, and ShieldGuard NET are each independent products with their own license. You can purchase only the products you need.
Is any personal information collected?
By default, no personal information or file contents are sent externally. See our Privacy Policy for details.
Protect your PC today.
Installation takes minutes, with clear guidance the whole way.
Buy ShieldGuard