Encrypt Decrypt: If you are using the built-in file encryption in Windows 7 or Vista, you may be interested in adding an option to the right-click menu to encode and decrypt your files more quickly, rather than using the file properties dialog box.
Adding this to the menu is simple – there’s only a single registry key to add.
Open up Regedit.exe through the start menu search box, and then find the following registry key:
In the right-hand pane, you have to create a new 32-bit DWORD value called EncryptionContextMenu and give it a value of 1. Now you will see a new option called Encrypt when right-clicking on a file.
When you will choose this option, you’ll receive the following dialog box, asking if you want to encrypt just the file, or also the Parent Folder. You can also choose just the file as a default.
Once the files/Folders are encrypted, you’ll notice that the title of the file/Folder is now green, indicating that it’s been encrypted. The right-click option will also now change to the Decrypt option.