This article explains how to resolve "Connect a fingerprint reader" error on M and E series notebooks
Users may get an error message prompting to connect a finger print reader when trying to set up their finger prints on a latitude M and E series notebook. This happens when windows password and the system password are set the same.
Enter the Wave software and change either the Windows or System password under the Preboot Manager section, then attempt to enroll fingerprints again. You will be able to enroll your finger prints without any problem..