I have run this occasionally for years and most files disappear leaving those that are being used..
I am posting only because I see something different as the same files remain..
I have used disc cleanup, safe mode, Ccleaner, and 6 or 7 remain.
The properties of each say they have been moved.
I Googled and there seems to be a lot of chat about this issue with 8.1.
If this is not an issue I am not concerned but if it is an issue I would like to correct it if I can.