Toshiba Portege Z930-K - Manual (Page 46)

Clean the sensor with a lint-free cloth - do not use detergent or any
other chemicals to clean the sensor.
Avoid the following finger conditions for enrollment or recognition as
they may result in fingerprint enrollment errors or a drop in the
fingerprint recognition success rate
Soaked or swollen finger, for example as may occur after taking a
bath.
Injured finger
Wet finger
Soiled or oily finger
Extremely dry skin condition on finger
Observe the following to improve the fingerprint recognition success rate.
Enroll two or more fingers.
Enroll additional fingers if a recognition failure often occurs when using
already enrolled fingers.
Check the condition of your finger - any conditions which have
changed since enrollment, such as injury, rough skin, and extremely
dry, wet, soiled, dirty, oily, soaked or swollen fingers, may lower the
recognition success rate. Also if the fingerprint is worn down or the
finger becomes thinner or fatter, the recognition success rate may be
lowered.
As the fingerprint for each finger is different and unique you should
ensure that only the registered or enrolled fingerprint or fingerprints
are used for identification.
Check the position and speed at which you swipe your finger across
the sensor - please refer to the preceding drawing.
The fingerprint sensor compares and analyzes the unique
characteristics in a fingerprint. However, there may be instances
where certain users are unable to register their fingerprints due to
insufficient unique characteristics in their fingerprints.
The recognition success rate may differ from user to user.
Points to note about Fingerprint Utility
If Windows 7 file encryption function EFS (Encryption File System) is
used to encrypt a file, the file cannot be further encrypted using the
encryption function of this software.
You can back up the fingerprint data or the information registered to
Automatic password input in IE.
Please use Import/Export on TOSHIBA Fingerprint Utility main menu.
Please also refer to the fingerprint utility Help file for more information.
You can start it using the following method:
Click Start -> All Programs -> TOSHIBA -> Tools & Utilities ->
Fingerprint Utility. The main screen is displayed. Click ? in the lower
left corner of the screen.
PORTÉGÉ Z930/Satellite Z930 Series
User's Manual 3-9