C drive in too messy

Users questions: C drive in too messy, and my computer is very slow, too many things must be the reason. So would like to delete some, but not indiscriminate deletion, which can be deleted which can not delete it?
Experts answer: virtual memory to another site close hibernation to move to another temporary folder drive c: * WINDOWS * Help * Help files which are useless to c: * WINDOWS * Web * Wallpaper * wallpaper left like the rest of the deleted C: * WINDOWS * temp * temporary file is deleted C: * WINDOWS * Prefetch * is read-file deletion
  • This information provided by the users.Thanks!