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Recovery Toolbox for Excel repairs corrupted Microsoft Excel files while preserving most tabular data, styles, fonts, sheets, formulas, functions, cell colors, borders, etc. [18] [19] [20] Recovery Toolbox for Outlook repairs data from corrupted Microsoft Outlook 's PST and OST files, including emails, contacts, reminders, meetings, tasks ...
Data damage can be caused when, for example, a file is written to a sector on the drive that has been damaged. This is the most common cause in a failing drive, meaning that data needs to be reconstructed to become readable. Corrupted documents can be recovered by several software methods or by manually reconstructing the document using a hex ...
A fix for this had been suggested to ISO/IEC JTC 1/SC 34/WG 4, and was approved in June 2009 as a recommendation for the first revision to Office Open XML. [ 34 ] Applications capable of reading documents compliant to ECMA-376 Edition 1 would regard ISO/IEC 29500-4 Transitional documents containing ISO 8601 dates as corrupt.
Due to the openly specified compression format used, it is possible for a user to extract the container file to manually edit the contained files. This allows repair of a corrupted file or low-level manipulation of the contents. The zipped set of files and directories includes the following: XML files content.xml; meta.xml; settings.xml; styles.xml
For XLSX files that can be opened but not edited, there is another attack. As the file format is a group of XML files within a ZIP; unzipping, editing, and replacing the workbook.xml file (and/or the individual worksheet XML files) with identical copies in which the unknown key and salt are replaced with a known pair or removed altogether ...
If a virus or 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.
.pptx – PowerPoint presentation.pptm – PowerPoint macro-enabled presentation.potx – PowerPoint template.potm – PowerPoint macro-enabled template.ppam – PowerPoint add-in.ppsx – PowerPoint slideshow.ppsm – PowerPoint macro-enabled slideshow.sldx – PowerPoint slide.sldm – PowerPoint macro-enabled slide.ppam – PowerPoint add-in
Due to the large size typical of today's backups, and faulty data transmission over unreliable USB or FireWire interfaces, backup files are prone to be corrupt or damaged. When trying to restore, NTBackup may display messages like "The Backup File Is Unusable", "CRC failed error" or "Unrecognized Media".
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