Ftdiun2k.ini [updated] Direct

: You can run the uninstaller from a DOS command prompt by navigating to the system directory and using the FTDI Knowledgebase syntax: [Uninstaller name] [Full file path of INI file] . Key Technical Details

If you are troubleshooting a computer where USB serial devices are not connecting, examining this .ini file can help determine if the correct Product ID is supported. "Gray market" FTDI chips (counterfeit chips often used in cheap Arduino clones) sometimes have slightly different PIDs, requiring manual modification of this .ini file to force the driver to recognize the fake chip—a common hack in the hobbyist electronics community.

The "UN" in ftdiun2k suggests this file is heavily tied to the uninstallation process. When a user attempts to remove FTDI drivers using a dedicated uninstaller utility provided by FTDI, this .ini file acts as a manifest. It lists: ftdiun2k.ini

[EEPROM] VID=0x0403 PID=0x6001 MANUFACTURER="FTDI" PRODUCT="USB<->Serial Converter" SERIAL_NUMBER="FT123456"

The most critical function of this file is mapping the hardware to the driver. USB devices identify themselves using a and Product ID (PID) . The .ini file tells the operating system: : You can run the uninstaller from a

Specifically, this .ini file is utilized by the FTDI driver installation package—often named FTDIUN2K (short for FTDI Uninstallation or Driver Package for Windows 2000/XP)—to define how the drivers are installed, how the hardware is identified, and how the software is uninstalled.

The file name provides historical context regarding its development era. The "2K" in ftdiun2k stands for . During the late 1990s and early 2000s, FTDI developed driver packages that were compatible with the Windows 2000 and Windows XP architectures (NT 5.x kernel). The "UN" in ftdiun2k suggests this file is

: For more advanced hardware testing or driver management, tools like the FTD2XXST utility are often used alongside standard driver setups.

If you encounter this file, it is likely a component of the package and is safe, provided it originated from a legitimate FTDI driver installer.