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.
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The nano board purchased was obviously not an official. Peter at amazon.co.uk/SODIAL-ATmega328-P-20AU-Module-Board-Blue-Black/dp/… helps out with driver to the ftdi-chip clone: wch.cn/downloads.php?name=pro&proid=65 All working. – user247245 May 7 '15 at 9:37
