A cyclic redundancy check (CRC) ensures that when data is being transferred, it is secure and uncorrupted … or cyclic redundancy checks are done to make sure your data is OK. Basically, it is a procedure that continuously checks data to ensure it wasn’t damaged during the transfer process. When a CRC error message is displayed, it usually means that the file the computer is trying to access has been corrupted in some way. Although this type of message may be daunting, on the plus side, it does not always mean that you have lost all of the data.
Data that is being transferred is broken down into small pieces, and each of the blocks of data is assigned a CRC value. If something goes wrong when the data is moving between the origination of the transfer and its final destination, the CRC value that it arrives with will not match the original one that was assigned when the transfer was started. It is at this time that the CRC error message will appear.
These types of error can occur with any type of data transfer, including sharing files over the Internet or a network or trying to read data from a CD or DVD. If the error occurred during the transfer process, the original data should still work fine, so in many cases trying the transfer again should correct the problem.
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