some time if our computer attacked by virus, the virushide some file that make anti virus cannot detect.This step is how to show hidden file or folder1 . Go to Start > Run2. Type regedit on the box3. On Registry editor navigate to:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL4. On the right pane, delete the value with * Name: CheckedValue * Type: REG_SZ * Data: 25. Create a new DWORD. Right-click on the right pane > New >DWORD Value6. Value should be: * Name: CheckedValue * Type: REG_DWORD * Data: 1HKLM\\Software\\Microsoft\\Windows\\CurrentVersionExplorer\\Advanced\\Folder\\Hidden\\SHOWALLedit...