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Fixing “bad CRC 77b89c0c should be 01b040db”

by anonymous

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A CRC (Cyclic Redundancy Check) process enables the user to identify the errors that occur during data transmission. It is highly beneficial in those cases, when the user wants to verify that the downloaded file is corrupt or not. If the file is corrupt, the user encounters a CRC error message. After the error message appears, the data saved in the downloaded file becomes inaccessible. To access the data in such cases, the user needs to restore the file from an updated backup or download the file again. However, if the file can not be reloaded and the backup is unavailable, then the user needs to repair the corrupt file. To do so, the user needs to opt for a powerful third-party Zip Repair application.

Consider a practical case, where you download a zip file ( and when you attempt to decompress the file using the WinZip application, you encounter the below error message:

“bad CRC 77b89c0c should be 01b040db” After the above error message appears, the file can not be decompressed. Furthermore, you encounter the same error message each time you try to decompress file.


The above error message occurs under below circumstances: file got corrupted during the transmission of the file. file was not downloaded systematically. file itself is corrupted.


Below are some measures that enable you to overcome the above error message: 1.Re-download the file. 2.If not possible, then you need to restore the file from an updated backup. 3.If no backup available, then repair the file, using Zip Repair application.

A Zip Repair tool uses effective repair techniques to repair Zip file after any logical corruption. The repaired file is in reusable state and is stored at user specified location. The software built with an interactive user-interface and is easy-to-understand. It comes with a detailed documentation,even though it can be used by a novice. The software is totally secure and does not allow the original data to be overwritten or modified.

Stellar Phoenix Zip Recovery is an effective repair tool that repairs corrupt zip archives. The software can Repair Zip file, regardless of whether they are password protected (WinZip 5.0 to 8.0) or non-password protected(WinZip 8.1 to 12.1). Compatible with Windows 7, Vista, 2003, XP, and 2000, the repair utility displays files in a tree structure. It is easy to operate and understand without any technical knowledge.

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