Description: Microsoft has an older utility called Windiff.exe that can be used to perform a detailed comparison of a file or the contents of a directory. This can be handy if you need to see if a file is damaged or perhaps directories contain different files than what the date and size show (which can be inaccurate). See screen shot below. The utility can take a while to complete if comparing a large directory.
How to use windiff.exe:
https://support.microsoft.com/en-us/kb/159214
Download for windiff.exe (part of support tools):
http://www.microsoft.com/en-us/download/confirmation.aspx?id=7911