The simplest and most direct way to permanently delete files or folders is by using the Shift + Delete keyboard shortcut.

Deleting files on a Mac is generally straightforward, but sometimes files can become stubborn and refuse to be deleted. Here are several methods to help you overcome common obstacles and successfully ...

This seems to indicate that it's related to Office, but I've never had Office installed on this computer. I'm trying to delete the files from an Explorer window.<BR><BR>I'm pretty sure I've seen this ...