   CITIZEN Thermal Printers Virtual COM Port Driver Version 3.0.0.13-3.0.0.20
                                                    Installer version 3.0.0.7
                                 Release Notes

                                                CITIZEN SYSTEMS JAPAN CO., LTD.
                                                             Apr. 22, 2026

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Summary
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This driver is a Virtual COM Port Driver for Windows. 
Please refer to the following manuals when you use it.
  - Virtual COM Driver Installation Guide


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Modification history
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Apr. 22, 2026
Added support for silent installation on Windows 10 and Windows 11.

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Sep. 02, 2024

Core isolation - memory integrity function is supported on Windows 11 and
Windows 10 x64.

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Jan. 15, 2020

Driver version remains same. Version 3.0.0.12-3.0.0.19
Installer version is newly set to 3.0.0.5.

  [Fixed problems]
If Secure Boot is enabled on Windows 10, problems will occur during installation. 
Adding the signature to the driver solved the problem.

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Nov. 27, 2013
Version 3.0.0.12-3.0.0.18 => Version 3.0.0.12-3.0.0.19

  [Fixed problems]

Driver freezes the application if the application uses 
Win32API "WaitCommEvent" and close it before the function call
is completed.

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April 19, 2012

Version 3.0.0.12-3.0.0.16 -> Version 3.0.0.12-3.0.0.18

  [Fixed problems]
   - Fixed the problem that cannot close the V-COM Port.


