C drive Why is this so?

Users questions: My C drive is about the size of a total of 9GB, but my C drive all the files (including hidden files) only a total of 6GB or so. There are 3GB where to go away? ? ? Temporary files, history, etc. have been cleared, drug also found no virus, just do not know anywhere to the 3GB. 77 7777 There are many documents do not show up, you try the "My Computer" menu in "Tools "****" Folder Options "****" View "****- to" show the contents of system folders "checked, then cancellation of that below the" Hide protected operating system folder (push Recommended )"**-" OK ", I tried it this way we can put all the files are displayed, but some of the hidden files do not suggest that you delete. In addition, you can download software such as the Super Rabbit, clean up own computer, right-click the C drive there is the drive letter, then select Properties ** In the "General" tab, select "Disk Cleanup" ** Select "Other Options" option Cary side "System Restore" to the right of clean **- then "OK", it should be able to restore a lot of space
  • This information provided by the users.Thanks!