How to Repair Corrupted Files

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How to Repair Corrupted Files. When efforts to open or delete a file fail, usually it is because the file is corrupted. Files become corrupted from application failures or system crashes. If the problem persists even when no crashes have taken place, the cause could be due to a virus infection. File corruption can also result from flaws in the hard drive's file system sector or the hard drive itself. Fortunately, damaged files are almost always salvageable, even if they haven't been backed up automatically.

Things You'll Need

  • Third Party Recovery Software

Readily Available Solutions

  1. Restore the lost file from a recent backup. Many programs create backups automatically. Microsoft Word, for example, backs up ".doc" files as ".wbk" files under the same folder. In this case, rename the ".wbk" file as ".doc" to open it.

  2. Use the Windows Disk Utility. If you run Windows 98 or Millennium, click Start, Programs, Accessories, System Tools and Scan Disk. Select the appropriate drive. Click Thorough Check, Automatically Fix Errors and then press Start. If you run Windows 2000 or XP, open My Computer and right-click on the drive. Select Properties and then Tools. Check the "Now" option. Check both available options and click Start.

  3. Utilize the System Restore tool after an installation or accidental disk format. A feature of Windows XP and Millennium, it rolls system files back to an earlier state when everything worked. Software installations, updates or removals sometimes make unwanted changes to the system.

Outside Sources

  1. Use Partition Recovery or HDD Regenerator to recover or fix lost top-level folders that contain many file types. You can also utilize FAT Recovery or NTFS Recovery, if you are not certain of your file type.

  2. Choose one of the following special-purpose recovery software. Each addresses a certain file type:
    DOC Regenerator for Microsoft Word documents
    XLS Regenerator for Microsoft Excel Files
    Outlook Express Repair for emails from Outlook Express
    Flash Recovery for image files
    Music Recovery for audio files such as MP3, WMA and RA
    CD & Recovery for files burned on one of those mediums
    Partition Recovery or FAT Recovery for fixing corrupted files in removable memory such as flash drive, memory stick or pen memory having a FAT or FAT32 format

  3. Hire a data recovery expert to match data fragments of corrupt files to fix data that software can't piece together. This should be the last resort after all attempts with software like those recommended above have failed. As the cost of hiring data recovery experts is very high, this measure is appropriate when the data is completely irreplaceable and its value is very high.

Tips & Warnings

  • Backing up frequently and letting an anti virus software run in the background are two precautions that can save you from losing files and data.
  • Third party software typically works like this: Download the demo. Install it. Run it on the target file. The software tells you if the file is salvageable. For the actual repair to be performed you have to buy the product license which can cost you from $30 to several hundred dollars.
  • Do not save or install programs after you realize that a file has been lost. Save and install operations can write over the "ghost file" that may be spread over many memory clusters.

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