Files Read Only on USB Drive

SolidWorks opens files as read only from USB drives. Thisonly happens when the user account is not an administrator.Administrators are able to open files from USB drives without anyproblems. Is there a setting that I have overlooked that is causingthis? I teach a variety of CAD software packages, and SolidWorks isthe only one that my students can't work directly from their USBdrives. I prefer the students not to have administrator privileges.I appreciate any assistance.SolidworksAdministration