open my computer, click on the tools menu an select folder options, then click on the view tab and a little way down the list of options there is one for show hidden files and folder, put a tick in the box next to that and click ok.
Now any hidden (or system files) will be shown slightly faded out when you browse the drives
Be careful a lot of those files will be there for a reason so don't just start deleting them unless your sure you know it's safe to do so