CRC is an acronym for Cyclic Redundancy Check, and its the basic method used by file decompressors to check that the data in the file has not been corrupted. When you see this error, it therefore almost always means a corrupted CAB or ZIP or program updater file, usually resulting from a bad or prematurely terminated download. In this case, you've almost certainly failed to download the patch correctly, not surprising given its size. Try again, and see if GetRight will work as this will automatically recontinue after interruptiono and lost connections. Bill