So, the user needs to install the USB driver manually. It is a simple process. Basically, the user has to download the USB driver and install it manually through the installation wizard. In this guide, we bring you the collection of Condor USB drivers for various models of the Condor devices. Drivers Installer for Passport USB Interface (COM3) If you don’t want to waste time on hunting after the needed driver for your PC, feel free to use a dedicated self-acting installer. It will select only qualified and updated drivers for all hardware parts all alone. To download SCI Drivers Installer, follow this link.

TH-D74A/E Virtual COM Port Driver | September 16, 2016 |
Introduction
Thank you for choosing the KENWOOD transceiver. You can connect your TH-D74A/E to a PC via a Micro-USB cable, and then utilize the Frequency Control Program or Memory Control Program we have provided.
After reading through the following explanations, feel free to download and install the software.
Operating Environment
1. Operating System (OS)
Windows® 7 (32-bit or 64-bit)
Windows® 8.1 (32-bit or 64-bit)
Windows® 10 (32-bit or 64-bit)
2. Peripheral Devices
USB 2.0 interface.
Installing the virtual COM port driver
ATTENTION: Do not connect the device to a PC before installing the virtual COM port driver.
1. Extract the downloaded file 'USB_CDC_Driver_TH-D74_V100.zip' into a designated folder. In the designated folder, a folder labeled 'USB_CDC_Driver_TH-D74_V100' will be created.
In the folder labeled 'USB_CDC_Driver_TH-D74_V100', double click the 'dpinst.exe' in the folder 'x86' with 32-bit OS, or the 'dpinst.exe' in the folder 'x64' with 64-bit OS.
After a few moments, the following window is displayed.
Click [Next>].
2. The following window is displayed, and the driver installation will begin.
Wait until the installation is completed.
3. After a few moments, the following window is displayed.
Click [Finish] to complete installation and exit.
Connecting the device to a PC
Turn the transceiver power ON, then connect it to a PC via a Micro-USB cable for the transceiver. The PC will detect new hardware.
The installation of the device driver software will start automatically.
If a reboot request appears, please reboot the PC.
Confirming the COM port number
Open the 'Device Manager' to confirm which COM port number is assigned for connection with the TH-D74A/E.
(Confirm the COM port number after turning on the transceiver and connecting the transceiver to the PC using a Micro-USB cable.)
For Windows® 7
1. Click the Windows® [Start] button.
2. Right-click [Computer], then click [Properties].
3. Click [Device Manager] in the displayed window.
4. [Device Manager] window will appear.
For Windows® 8.1 and Windows® 10
1. Right-click the Windows® [Start] button.
2. Click [Device Manager] in the displayed window.
3. [Device Manager] window will appear.
Click 'Ports (COM & LPT)' to extend it, then you can find 'TH-D74 (COMxx)'. The 'COMxx' number is different depending on your PC.
In the above example, 'TH-D74 (COM3)' is listed. This means that COM3 is assigned for the connection with the TH-D74A/E.
Select this port number in the configurations for communication in the software you are using.
If you agree with the details listed above, click the following link to download the virtual COM port driver installation program.
Update History
First Release (September 16, 2016)
Windows®, and Windows logo are registered trademarks of Microsoft Corporation in the United States and/or other countries.
Virtual COM Port Drivers for Ross-Tech USB Interfaces
Older Ross-Tech RS-232 Serial interfaces can be set to power up as 'dumb K-Line pass through' interfaces. This allowed those old Serial interfaces to be compatible with a wide variety of third-party applications which expect a 'K-line pass-through' serial interface. However, our USB interfaces present additional challenges. Early in their development, we found a number of technical advantages to using a 'direct' USB driver which bypasses the Windows Serial drivers entirely. Hence the USB drivers that ship with VCDS do not emulate a serial COM port and cannot be used with applications that expect to communicate via a serial port.
NOTE: The following applies to our legacy USB interfaces (HEX-USB, KII-USB and HEX-USB+CAN). It does NOT apply to our current HEX-V2 or HEX-NET interfaces. These new interfaces do not use a USB UART chip and cannot be be used for 'dumb K-line pass-through'!
In order to facilitate the use of third-party applications which expect to communicate with a serial interface, drivers that emulate a COM port are available. However, anyone thinking about using them needs to be aware of the following points:
We do not offer installation support for these drivers. They should be used only by someone who is competent/comfortable installing (and possible uninstalling) USB drivers on his PC.
We cannot offer any support for third-party software, nor any guarantee that it will work correctly with these drivers. Of course, the same would apply with a serial interface as well.
That said, here some installation notes:
These drivers are compatible with Windows 2000 and newer. They should work with W2K, XP-32, XP-64, Vista-32 and Vista-64. We do not have any VCP drivers for Windows 98!
Unzip the contents of the download into a new folder.
With an interface plugged in, find it in Device Manager, right-click it, and select Update Driver.
Depending on what drivers your system already has installed, you may have to 'force' these by telling the wizard not to search, but to let you specify what driver to install, then doing the Have Disk and Browse thing.
There's also the possibility that the Virtual COM Port won't install automatically. We've found no real pattern why it does on some systems and not on others. If it does not, find the interface in Device > Manager. The name should show '... with VCP'. Open the properties sheet, click the Advanced tab, and make sure Load VCP is checked. Once checked, disconnect and re-connect the interface.
Once the USB Serial Port is installed, you may need to change the COM Port Number (depending on how high a number the applications supports). Device Manager, Properties sheet for the USB Serial Port, Port Settings tab, Advanced button. The COM Port Number may change if you plug the interface into a different USB port, so I'd recommend always using the same USB port.
VCDS should continue to work fine with these drivers installed. Leave VCDS set to USB, not a Virtual COM Port!
Assuming you've read and understand all of the above, you can download the 'Virtual COM Port' drivers here:
Download Passport Usb Interface (com3) Drivers
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