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=== Backup of files ===
A defensive strategy against unintentional data loss is the regular backup of important files. Users can make multiple copies of important data and store them either on the same computer or on another device such as a compact disc or an external hard drive. <ref name="six">[http://www.microsoft.com/protect/yourself/data/what.mspx http://www.microsoft.com/protect/yourself/data/what.mspx], How to Decide what Data to Back Up </ref> Users can also upload important files to the Internet, provided they have access to Internet storage services.
=== Restoration ===
Some operating systems give users the option of performing a procedure that restores a computer to a predetermined state. If no option is available, a user can obtain the appropriate restoration software for their system. In the event of a system failure or a serious case of data loss, a user can restore any lost or changed files and remove any malicious files that did not previously exist.<ref name="six">[http://www.microsoft.com/protect/yourself/data/what.mspx http://www.microsoft.com/protect/yourself/data/what.mspx], How to decide what data to back up </ref>
There are many ways users can unintentionally lose information on a computer. Some examples include a child playing the keyboard like a piano, a power surge, lightning, floods, and equipment failure. <ref name="six">[http://www.microsoft.com/protect/yourself/data/what.mspx http://www.microsoft.com/protect/yourself/data/what.mspx], How to decide what data to back up </ref>
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