Microsoft Device Guard and Credential Guard

The drivers provided in the Serialtest Async software installation do not officially support PC Hosts running Microsoft's Device Guard or Credential Guard security features. Signed drivers with support for Device Guard and Credential Guard may be downloaded here.

Information about managing (enabling/disabling) Device Guard or Credential Guard is provided by Microsoft:

Download Latest Release
Serialtest (17.3.13224.14323) Windows 7, 8.1, and 10 (32-bit & 64-bit)
Release Notes
Features Added
  1. Added support for Window 8.1 and 10. Improved software installation on Windows 8.1 and 10 Windows operating system by organizing the items in the Start Menu.
  2. No driver installation needed. RS-232 and RS 422/485 drivers are automatically installed with the software.
  3. User can install Serialtest Async software without plugging in a hardware.
  4. Increased default buffer size. User may further increase it from "System Settings" menu item.
  5. Note: The capture files created with this software not compatible with older software. Users are prompted to get the new software to view files. The capture files created with software before version 12 can be opened with the new software.
Legacy Download Versions

Older software versions are available through Frontline customer support at All customers are encouraged to upgrade to the latest version of the Serialtest software.