can't move file to trash
While downloading a pdf crossword puzzle, the download failed, leaving a "pdf.part" folder and an uncompleted pdf file on the desktop. Attempting to move them to the trash elicits an error message "The item “filename_1350348131079.pdf” can’t be moved to the Trash because it can’t be deleted." The browser is Firefox 16.0.1 . Please show me how to remove these files from my computer.
20" IMac-OTHER, Mac OS X (10.7.5)