Lenovo ThinkPad E475 User Manual

Also see for 20H4: Hardware Maintenance Manual

• Your finger is wrinkled.• Your finger is rough, dry, or injured.• Your finger is stained with dirt, mud, or oil.• The surface of your finger is different from when you enrolled your fingerprint.• Your finger is wet.• A finger is used that has not been enrolled.To improve the situation, try the following:• Clean or wipe your hands to remove any excess dirt or moisture from the fingers.• Enroll and use a different finger for authentication.Deleting data from your storage driveSome of the data stored on the storage drive might be sensitive. Handing your computer over to someoneelse without deleting the installed software, such as operating systems and programs, might even violate thelicense agreements. Be sure to delete data stored on the storage drive before you dispose of, sell, or handover your computer.You can use the following methods to delete data from the storage drive:• Move the data to the Recycle Bin, and then empty the Recycle Bin.• Format your storage drive, using the software to initialize it.• Use the recovery program provided by Lenovo to bring the storage drive back to the factory defaultsettings.These operations, however, only change the file location of the data; they do not delete the data itself. Thedata is still there, even though it seems to be lost. Thus, it is sometimes possible to read the data by use ofspecial software for data recovery. There is a risk that people of bad faith might read and misuse the criticaldata on storage drives for unexpected purposes.To prevent leakage of data, it is important that you delete all the data from the hard disk drive when youdispose of, sell, or hand over your computer. You can destroy the data physically by smashing the hard diskdrive with a hammer, or magnetically by means of strong magnetic power, thus making the data unreadable.But it is recommended that you use the software (payware) or service (pay service) developed for thatpurpose. The process might take several hours.For disposing of data on the solid-state drive, Lenovo provides the Drive Erase Utility for Resetting theCryptographic Key and Erasing the Solid State Drive tool.Some computers might support a Disk Encryption hard disk drive or Encryption solid-state drive and havesuch a drive installed. You can logically dispose of all the data on the drive in a short time by erasing thecryptographic key. The data encrypted with the old key is not physically erased but remains on the drive;however, it cannot be decrypted without the old key. This feature is also available with the Drive Erase Utilityfor Resetting the Cryptographic Key and Erasing the Solid State Drive tool.Using firewallsIf your system is preinstalled with a firewall program, it protects against computer Internet security threats,unauthorized access, intrusions, and Internet attacks. It also protects your privacy.42 E475 User Guide