The enrollment fingerprints are converted to a mathematical set of values.
Then, when you authenticate with fingerprints, those swipes are converted to mathematical values, if the values are within acceptable ranges of eachother, the logon is considered successful.
It is impossible to swipe a finger in exactly an identical manner and it would be too cumbersome and easy to circumvent if an authenitcation fingerprint was to be "overlayed" to the enrollment prints for comparison.
This is the fundamental method of biometric authentication either fingerprint, voice or even iris.
Thus, your enrollment prints aren't being stored anywhere as human readable images such as those taken with traditional ink and rolled onto a fingerprint card.
If you had to use your Biometric sensor as a fingerprint image capture, you can use the biometric testing applet such as the one in the control panel and swipe your finger that is rendered on the screen as an actual image.
Use PrtScrn or equivalent screen capture software to capture that image and save it in the format you prefer.
But it wouldn't be suitable for submission to the US DoJ for fingerprint validation if that was any reason you were trying to determine where images of your fingerprints would be stored on the local system.
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