End of TACHYON Internet Security 5.0 Basic(Free) Service Notice
Dear Valued Customers,

Thank you for using TACHYON Internet Security 5.0 Basic.
TACHYON Internet Security 5.0 Basic Service (free) will end on
October 31, 2020.

You can use more services by switching to TACHYON Internet Security 5.0 Premium service (paid).
We offer a variety of monthly payment services.

We will reward you with a better service.
Thank you.

Ultimate Anti-Virus protection against various threats for personal PC


TACHYON Internet Security is advanced endpoint protection solution that blocks cyber threats such as malware, spyware, ransomware, etc. Safely protect user system and important information with improved real-time monitoring and protection features.



  • Real-time advanced scanning of malwares such as virus, spyware and ransomware
  • Various file format analysis and multi-detection
  • Detects macro virus in Microsoft Office
  • Removes malware exploits in PDF document

Behavior-Based Detection

  • Protection against new and emerging malware
  • APT attack prevention


  • Detects and blocks suspicious ransomware program
  • File encryption and damage prevention

MBR Protection

  • Anti-hacking for MBR
  • Prevents PC start up fail and data damage


  • Prevents hacking with real-time network protection
  • Blocks un-authorized incoming traffic
  • Shared folder monitoring and access management
  • External protocol program detection and alert system
  • Un-authorized access detection and blocking through IP/Port

Integrity Verification

  • Product module tampering / hacking verification


  • Product registry, file and process protection


  • Backup and restore option in quarantine

PC Management

  • Manage installed programs, ActiveX, Start programs and toolbar

PC Optimization

  • Optimize PC environment including network speed, memory usage and system settings

Windows update

  • Check for Windows Update.
  • Select and install/uninstall Windows updates.

File Wipe

  • Supports the feature of wiping file and folder completely.
  • Supports 4 types of wiping file algorithm and feature to wipe file using a wanted algorithm.
    (Peter Gutmann, US DoD 5220.22-M(8-306. /E, C and E), US DoD 5220.22-M(8-306. /E), Single Pass algorithm)
  • Prevents file recovery by repeatedly overwriting data in a wiped data spaces.


  • Real-time, periodic and emergency pattern and product updates
  • Periodic pattern and product update through reservation setting
  • Auto and manual updates


  • Log data of product and malware detection/cure/delete history

System Requirements

Operating System

  • Windows XP SP3 (32bit)
  • Windows Vista SP2 (32bit, 64bit)
  • Windows 7 SP1 (32bit, 64bit)
  • Windows 8.0 (32bit, 64bit)
  • Windows 8.1 (32bit, 64bit)
  • Windows 10 (32bit, 64bit)


  • CPU 3.8 GHz Intel Pentium 4 or higher processor
  • 2 GB of RAM or more
  • Minimum 20 GB of available hard disk space


  • Supports Korean, English

※ General information on the operating systems supported by TACHYON products, and detailed versions are provided separately.

Precautions before use

  • 1 PC-1 Endpoint protection program is recommended for reliable operation of your PC.

  • Be sure to delete other Endpoint protection programs before installing the TACHYON product.

  • ※ If TACHYON products are installed together with other similar products, they may not work properly.

Usage guide

  • This product can be installed up to basic 3PC regardless of Windows operating system.

  • This product can only be purchased with an individual member ID, and only one product can be registered per ID.

  • The right to use this product is provided upon purchase and can be used immediately after downloading and installing the program.

  • This product is used for contract period, and you can receive the latest engine updates, upgrades, and customer support services.

  • This product is personal / home use software and cannot be used for commercial purposes such as personal business and corporate (corporate, government office).

  • In the case of repurchase/extension contract, the discounted price is applied automatically.

Refunds guide

  • You will be fully refunded within 7 days from the date you purchase it.

  • If you apply for cancellation after 7 days from the date of payment, the remaining amount of the remaining days will be refunded based on the remaining amount of the service payment, excluding PayPal fees.

  • - Refund calculation : paid amount – (paid amount x 4.4% + $0.30 USD) – [(paid amount/ number of contract days ) x number of used days]
    ※ PayPal fees : Selling fee is 4.4% + $0.30 USD per international payment by PayPal

User Interface

  • Main UI

  • Security Center

  • PC Management

  • PC Optimization