Safer-Networking.org's Spybot Search & Destroy v1.62 has a specific plug-in, (to add,) called Secure File Shredder. I wanted to update this post to mention it.
You can customize your installization to make sure almost everything unwanted isn't included BUT that.
Simply drag the bar at the bottom of the utility to make the "number of passes" (attempts to delete difficult folders) up to 35, the maximum, then click "chop away!." You can click the "+" sign to add as much as you want.
Also, if you have a .txt or Notepad document open ahead of time, you can perhaps find it easier or save time by building your list so you don't have to click around through that + menu in Spybot S&D.
That isn't a perfect application, but the only one I've found to work more than any other.
My ultimate and personal favorite as a last resort is within an Anti-Spyware program, Malwarebyte's Anti-Malware (download.com, also Malwarebytes.org.) It's in the last tab within the program, called FileAssassin.
It's just like FileShredder, you navigate to desired folder or file. However, once you choose to delete it, it's a very secure process, not "within Windows," or explorer.exe-inclusive. They suggest (rightfully so,) nearly demanding a restart. When you delete it through FileAssassin, assuming it requires that type of a tool, it's important to do so on the spot.
Good luck and I hope this update helps.