Defragmenting stays at 39%

Running Vista. Defragger V2.10.424

When I run quick defag it completes. Full dfrag stays at 39%. Looks like it is focused on C:\WIPETEMP5.

I have run this program six months ago and all was fine. It is a great program that fixed one of my other computers from starting up. So I welcome help here...Tks

where does wipetemp5 come from? What program created/uses it?