These steps are useful in those cases where you are dealing with a malware situation and you need to find and remove the infected files, which could be hidden.
Follow these steps to display hidden objects in Windows:
Click Start, go to Control Panel.
In Windows 8: From the Windows Start screen, locate Control Panel (for example, you can start typing "Control Panel" directly in the Start screen) and then click its icon.
Select Folder Options.
Go to View tab.
Select Display contents of system folders (for Windows XP only).
Select Show hidden files and folders.
Clear Hide extensions for known file types.
Clear Hide protected operating system files.
Click Apply and then OK.