Rich, with the transition to universal apps and the like, I never know how accessible any given program might be to someone in the abstract.

You could certainly try out CCleaner Standard Free to see if it works for you.  Under the Tools Pane is the Drive Wiper tool.  Once you've selected that you have a dialog that lets you choose:

• Free Space on a drive or the entire drive, contents and all
• The number of overwrite passes:  1, 3, 7, or 35  (each being more secure and adding time to the process - 35 takes forever)
• And a series of checkboxes for the drive or drives you wish to select on which the wipe action will be performed

--
Brian

Here is a test to find out whether your mission in life is complete.  If you’re alive, it isn’t.

    ~ Lauren Bacall