system disk shows more disk space occupied but when u open there are no enough files

Hey!!!
Have u wondered that system disk shows more disk space occupied but when u open there are no enough files, don't worry it may be due to the fact that some files might be hidden.To make the hidden files displayed ,  open my computer>click on the Tools button and select folder options and click on the view tab and click on the show hidden files and click apply and then ok.....all the hidden files will be displayed