A CRC is a cyclic redundancy check error that can make it where you cannot get into a file. Basically a glitch happened when you were downloading the file. The first and easiest fix you'll want to try is to simply delete the file completely and attempt to re-download. If that doesn't work, you can try ziprepair.com. Download the program and run it to see if it can perform a quick fix of the
. corrupted file. If all else fails, look for a different copy of the file.
