How to Fix Corrupt Zip Files
If a ZIP file is improperly downloaded or otherwise damaged, it can become corrupted, meaning that you can't extract the files from within the ZIP file easily. The obvious solution to this issue is to re-download the ZIP file from the Internet, but if you are unable to do so, you can attempt to repair it with a system utility on your computer.
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Instructions
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Click on the "Start" button, click on "All Programs" and then go into "Accessories."
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Right-click on the "Command Prompt" program and select "Run as administrator."
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Type "cd directory_path_to_zip" where "directory_path_to_zip" is the fully qualified path to the corrupted zip file, such as "C:\Windows\" if your ZIP file is located in the Windows directory on your computer.
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Press the "Enter" key and then type "c:\windows\system32\wzzip -yf corrupt_zip.zip" where "corrupt_zip.zip" is the name of the ZIP file you want to try and recover.
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Press the "Enter" key and Windows attempts to fix the corrupt ZIP file. If this process is successful, a new ZIP file is created in the directory alongside the corrupt zip file with the same name as the corrupt zip file, only with the suffix "FIXED" on the end.
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