When I look at the properties of drive c: it shows that it is a 1.7 terabyte drive and 1.5 terabyte is in use. I have manually looked at the properties of every folder off of the root of C: and when I add up the sizes I get 73 gigabytes. I have turned on the hidden files option for all folders so I am looking at all folders to my knowledge. Where could the other unaccounted for 1.424 terabytes be located??