How can I use my IBM/Lenovo keyboard fingerprint reader on a non-lenovo Windows 7 PC?

I just had almost the same problem: I was trying to install a brand new "Lenovo Preferred Pro USB Fingerprint Keyboard" on my self-assembled PC running Windows 7 64-bit. Without any driver, it showed up as a USB Hub with an Unknown device and a USB Composite device connected. The composite device consists of 2 USB Input Devices: A HID Keyboard device and another HID-compliant device

First, I landed here: http://support.lenovo.com/us/en/documents/pd029581 - obviously the correct page describing exactly my keyboard (so it is apparently a newer model than yours). From here I downloaded and installed the "Lenovo Preferred Pro USB Fingerprint Keyboard Hotkey (Win 7) driver" Version 3.4.0.1.

After a reboot, I found the Biometric device - showing as "Synaptics FP Sensors (WBF) (PID=0015)". Actually I now see a total of 7 USB devices connected: An USB Hub with the Synaptics sensor and the composite device consisting of 2 USB input devices: One now shows as "Lenovo Preferred Pro USB Fingerprint Keyboard" and the other still as HID-compliant device.

But then I went through multiple attempts to install the "ThinkVantage Fingerprint Manager Pro Software" linked from the same page (Version 8.01.42). But no way, the installation always failed with a message saying "Setup cannot be executed on this computer".

Finally, I found this page: http://support.lenovo.com/us/en/downloads/ds101045 with "Lenovo Fingerprint Reader/ Password Vault for 64-bit Windows". This version finally installed and now works fine for the Windows login.

Hope this is at least somewhat helpful... Good luck!