My friend Chris recently took the plunge and installed Windows 7 on his Lenovo T61 notebook.  He had managed to get the fingerprint reader working on it and has documented the process in great detail. 

After rebuilding my trusty T61 with Windows 7 about a week ago, the only device that was not functioning correctly was the “biometric coprocessor”. I tried installing the software using ThinkVantage Productivity Center, but this did not work. After asking google, I found that the device was manufactured by UPEK and that they have released a Windows 7 driver on their site.

Chris’ post is a great reference on how to install and configure the Lenovo T61 fingerprint reader in Windows 7.  Check it out.