A CRC error means the file or directory is broken. Maybe you can better remove the file/directory from your disk, perform a disk check, defragment and reinstall the patch. However I don't know what's in that folder so please be cautious. If you remove the folder and the patch only installs a part of the contents then you have a problem. Try moving the files in the folder to a temp folder, remove the index folder, diskcheck, defragment, recreate the index folder and move the files back.