⚡ Lightweight • 🛡️ Private-by-Design

Security software that keeps your PC fast, private, and protected.

Real‑time antivirus, firewall hardening, and anti‑phishing in one easy package. Zero ads. No registration required.

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Compatible with Windows 10/11 • macOS 13+ • Lightweight < 200MB

Real‑Time AV

Threats blocked

0 today

Firewall

Network status

All ports stealthed

Anti‑Phishing

Web protection

Malicious pages blocked

Auto‑Update

Definitions

Updated hourly

Real‑Time Antivirus

Detects malware, ransomware, and PUPs using on‑device ML and cloud lookups.

  • On‑access & on‑demand scans
  • Ransomware rollback
  • Quarantine & restore

Firewall Hardening

Blocks suspicious outbound traffic and unknown inbound requests automatically.

  • App‑aware rules
  • Micro‑updates
  • One‑click lock‑down

Web Shield

Stops phishing pages and malicious downloads across all major browsers.

  • DNS & HTTPS filtering
  • Real‑time reputation
  • Parental controls

Downloads

Choose your platform and start your free trial. No sign‑up required.

Checksums and offline installers available on the Guides page.

Quick Start

  1. Download the installer for your platform.
  2. Run the installer and allow required permissions.
  3. Open the app and click Start Protection.
  4. Turn on Web Shield in your browser extension settings.
  5. Schedule a weekly full scan.

Need Help?

Visit our knowledge base for troubleshooting, offline updates, and enterprise deployment.

Open Knowledge Base Contact Support

Frequently Asked Questions

Do I need to create an account?

No. You can download and use the free trial without registering.

Will it slow down my PC?

CSI Protect is optimized for low memory and CPU use, with smart scheduling for scans.

How often are definitions updated?

Updates run automatically every hour and can be triggered manually.

Contact

Questions or enterprise licenses? Email us and we’ll get back to you.

Email Support

We do not collect personal data beyond what’s required for support.

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