Verified answer

files that are there when you are uploading files to the internet a certain way, they are not needed as they are copies of the files you upload, at least i am pretty sure thats what they are i always get rid of them and it never harms me.

I have tried doing that a few times on my computer(XP SP2) a few months ago. They don't get cleared.Any way mine takes up only 32 KB so I just let them be and they have remained unchanged even until now.