Show hidden file (if folder option is not working)

Follow this step
  Run>regedit>HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL
Delete checkedValue and then 
right clickc> new DWORD VALUE with same name Checkedvalue
next right click on data  value and go to modify and change the vulue
0 with 1
now all hidden file will show