Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
at http://www.ftdichip.com/FTDrivers.htm they seem to divide chips into two categories, FT4222H vs. D2XX driver.
What's the correct for a arduino nano?
The Official Arduino Nano has an FTDI FT232RL.
You want to use the Virtual Com Port(VCP) Driver so the FTDI device appears as a COM port under windows.
See the getting started guide for details.
Required, but never shown