In tip 3109, we reviewed the DIR command.
A quick way to determine the owner of a file is to open a CMD prompt and type dir /q <Drive:>\Folder\FileName.Extension.
You will receive a display similar to:
Volume in drive D has no label. Volume Serial Number is E3D8-7153 Directory of d:\zipnew 01/13/2001 16:09 3,781,203 JSIINC\Jennifer Personal.mdb 1 File(s) 3,781,203 bytes 0 Dir(s) 5,175,266,816 bytes free