data 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 hard disk drives or solid-state 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. For disposing of data on the hard disk drive, Lenovoprovides the Secure Data Disposal tool. Go to http://www.lenovo.com/support to download these tools.If an Encryption solid-state drive or a Disk Encryption hard disk drive is supported and installed in yourcomputer, you can logically dispose of all the data on the drive in a short time by erasing the cryptographickey. The data encrypted with the old key is not physically erased but remains on the drive; however, it cannotbe decrypted without the old key. This feature is also available with the Drive Erase Utility for Resetting theCryptographic 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 accesses, intrusions, and Internet attacks. It also protects your privacy.For more information about how to use the firewall program, refer to the help information system thatcomes with the program.Protecting data against virusesYour computer is preinstalled with an antivirus program so you can detect and eliminate viruses. Theantivirus program is designed to help you detect and eliminate viruses.Lenovo provides a full version of antivirus software on your computer with a free 30-day subscription. After30 days, you must renew the license to continue receiving the antivirus software updates.For more information about how to use your antivirus software, refer to the help information system ofyour antivirus software.54 User Guide