This needs further investigation. So you get a question mark? But before it had a different icon for the zip or rar files? I wonder if it's due to the utility that did the compressing. Perhaps a 3rd party app. There's a no. of apps that can compress a file into those formats. It may have been done on a different operating system environment. I know for mac, the filesystem is different & xtra info is added to each file to give it more unique info. But when you put these files onto a windows platform then this xtra info will be ignored & may have difficulty reading the full info of the file. I don't know if that makes sense to you?