ADD ENCRYPT/DECRYPT OPTIONS TO WINDOWS 7/VISTA RIGHT CLICK MENU

Step1: go to run

Step2:write registry.exe and enter

Step3: then follow this path- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced

Step4: In the right-hand pane, create a new 32-bit DWORD value called EncryptionContextMenu and give it a value of 1 and its done.