The Nuance® PowerMic® II firmware allows for plug and play functionality with Windows® 2000, XP, Vista, 7, 8, and 10. The microphone has a serial number label on the back that identifies its firmware version.

The serial number beginning with the following prefixes indicates firmware version 2.02, or higher: [A] & [E] with an additional label stating F.W. Ver 2.02″

As of today (5.31.11), the latest firmware is version 2.03.

If you are not running the latest firmware version, it can be downloaded and installed using the firmware update tool.  The tool can be downloaded by following the link below:

Verification Source: Nuance Website