I have a truly crazy problem which i can honestly say i have never seen before. I am running an exchange server on a windows server 2003 platform, this machine for the past several months has been loosing hard drive space on the C: drive and as of the first part of this week i lost all room and wound up moving the swap file to make more room.. I still have the problem of the fact that there is something still eating hard drive area.. I have run the program windirstat against the drive and i have found a file of unknown origin or type which is growing.. This file DOES NOT show up in windows and resides on the root of C:.. I see no name for the file , even in windirstat ?? How can i delete that which i cannot see?? I would love to be able to get a definite ID on this thing before i wipe it out.. Am i crazy??