We are in the process of moving files from one drive to a larger drive.  I was able to move all of the files in one directory (there were many) except one file.  Our server thinks this file is in use by another process.  It isn't. I have tried using the cmd prompt to delete the file but that didn't work.  I tried the RmDir /S /Q, I tried the old del (name of file) I continue to get the message this file is in use by another process.  I have changed all of the security on this file, I unchecked the boxes for archiving.  Nothing works.