I have seen this happen on a work machine. I've been digging my brains for what it was about... here's what I remember:

Is this on a network? Because it had something to do with being on a network (this was around...3 years ago so please pardon my lack of memory).

It was something like storing cache of network drives on the local machine.

If you arn't on a network with shares, ignore me and I'll go sit in the corner and think some more for you