If you don't want to boot into safe mode each time you want to delete something, you could try DELETE, even though I've heard that it doesn't work all the time. However, I've never used the program myself, go I can't guarantee anything.
I've used the program Eraser, and although it's supposed to delete files and not leave a trace behind, I find that it doubles just as well as a deletion device. You should definitely try it out. It should work, but if it doesn't remove it, tell me. I'll see if I can remember another program that'll work.