Most files are rarred up, meaning that you need winrar to unpack the file, if the files were corrupt it would not be only you that would notice this, get winrar and try again. As for the ban it is as probably previously stated exeeded files. Winrar involks a CRC check (cyclic redundancy check) which means it is bit of mathematics used to ensure that your data is OK when being transfered. It's a check identifies when data has been damaged. If you get this message, it means that the file being read by your PC or software is corrupted or even that you are not using the correct decompression tool or you may even have noise on your line.
