On Windows 7, 8, and 8.1, ThinkPad T/W/X systems use fingerprint software.  T440 and later models use Lenovo Fingerprint Manager Pro.  This software was needed because those versions of Windows did not natively support fingerprint readers.

Starting with Windows 10, Microsoft has added full support for fingerprint readers into the operating system.  You only need a driver.  The fingerprint software is no longer needed, and should be uninstalled prior to upgrading to Windows 10.  The purpose of this guide is to help you upgrade your Win7/Win8/Win8.1 system to Windows 10, so that you can successfully continue using your fingerprint reader.

Before upgrading to Windows 10, you need to make sure you know your Windows password.  Whether you have fingerprints enrolled or not, the Windows 10 upgrade process will ask you for your Windows password, so you must know it.

Below are the steps I took to successfully upgrade a T450 system running Windows 7.  My system has 2 fingers enrolled, and I also have preboot authentication where I use my fingerprint to enter the BIOS Power-On password.

1. Open Control Panel -> Programs -> Uninstall a Program.  Scroll down to Lenovo Fingerprint Manager Pro and then click on "Uninstall/Change".
2. Click "Yes" at the prompt about "Are you sure...?"
3. When the uninstallation finishes, click on "Finish" to restart the computer as prompted.
4. After the reboot, log into Windows using your Windows password.
5. Upgrade to Windows 10
6. After the upgrade, open Device Manager (type Device Manager into the search bar)
7. Expand the category for “Biometric devices”
8. Double-click on the fingerprint device. On my system, it’s called “Synaptics FP Sensors (WBF) (PID=0017)
9. Click on the “Driver” tab
10. Click on the “Update Driver…” button
11. Choose the option for “Search automatically for updated driver software…”
12. You should see a message like “Windows has successfully updated your driver software”. Click on “Close”
13. Back on the “Driver” tab, confirm that the Driver Version is now 4.5.308.0 or later. This is the latest version of the driver as of July 31, 2015
14. Click on “Close”, and then close Device Manager.
15. The next step is to enroll fingerprints in Windows 10, to do this, we use the new Windows 10 feature called “Windows Hello”. To get to it, open Settings -> Accounts -> Sign-in options
16. To use Windows Hello, Microsoft requires that you first set a PIN. Under the PIN section, click on the Add button to create a PIN.  Follow the on-screen prompts to create your PIN.
17. Under the Windows Hello section, find the fingerprint item and click on the “Set up” button. Follow the on-screen prompts to enroll your finger.  Enroll more fingers if you want to.
18. Windows 7 only: You might see a problem where the “Set up” button is greyed out, and you can’t click on it.  You might also see red text at the top of the Sign-in options windows that says “Some settings are managed by your organization”.  As of July 31, 2015, this is a bug that we are working with Microsoft to solve.  You can manually fix it yourself by modifying the registry.  Download the attached .reg file, double-click it, and then click on “Yes” to confirm that you want to modify the registry.  Reboot the PC and then go back to step 17.

Any questions or comments, please leave them here.  I hope this was helpful.  Thanks for reading!

NOTE ABOUT T430 AND EARLIER:

These systems (with Authentec fingerprint readers) use ThinkVantage Fingerprint Software which is still needed on Windows 10.  It can be downloaded here:  http://support.lenovo.com/us/en/downloads/ds036923