Editing Data corruption (section)

{{Short description|Errors in computer data that introduce unintended changes to the original data}}
{{redirect|Corrupted|the Japanese metal band|Corrupted (band)}}

[[Image:Data loss of image file.JPG|thumb|Photo data corruption; in this case, a result of a failed data recovery from a hard disk drive]]
'''Data corruption''' refers to errors in [[computer data]] that occur during writing, reading, storage, transmission, or processing, which introduce unintended changes to the original data. Computer, transmission, and storage systems use a number of measures to provide end-to-end [[data integrity]], or lack of errors.

In general, when data corruption occurs, a [[Computer file|file]] containing that data will produce unexpected results when accessed by the system or the related application. Results could range from a minor loss of data to a system crash. For example, if a [[Document file format|document file]] is corrupted, when a person tries to open that file with a document editor they may get an [[error message]], thus the file might not be opened or might open with some of the data corrupted (or in some cases, completely corrupted, leaving the document unintelligible). The adjacent image is a corrupted image file in which most of the information has been lost.

Some types of [[malware]] may intentionally corrupt files as part of their [[Payload (computing)|payloads]], usually by overwriting them with inoperative or garbage code, while a non-malicious virus may also unintentionally corrupt files when it accesses them. If a virus or [[Trojan horse (computing)|trojan]] with this payload method manages to alter files critical to the running of the computer's operating system software or physical hardware, the entire system may be rendered unusable.

Some programs can give a suggestion to repair the file automatically (after the error), and some programs cannot repair it. It depends on the level of corruption, and the built-in functionality of the application to handle the error. There are various causes of the corruption.