Cannot delete files or folders after virus

We had to completely re-format the drive.  We saved all of the valuable files and folders on our D: Drive.  We moved them all back to our C: Drive and now when we go to delete the old backup files and folders on the D: Drive it just does not delete them.  No message or error.

I did a search and when I went to try to delete them from the search Window there is a small box that comes up. No delete option, just Open, Edit, Print and Open With.

How do I get rid of these old folders and files I no longer need?

Thanks in Advance

Tony