I think MMario's comment about hidden files in DOS came while I was writing.
If you don't see a folder that should be there, use the ATTRIB command exactly as you would use the DIR command (ATTRIB *.*). The "hidden folder" will show. You can normally use the CD command to move into a hidden folder without "unhiding" it, but if necessary you can remove the hidden attribute "ATTRIB -H <filename>." You should remember to put it back to hidden when you're done, since Windows may "need it to be that way."
I meant to note that I've seen a tribalfusion cookie on my machine, immediately after looking for some info on reservation locations. I assumed it was related to the Indian casino adware, but had no trouble deleting it.