Indexing encrypted files in Windows
In Windows 7, on the control panel, you'll find the the 'Indexing Options' utility. This will give you the option to index encrypted files. After clicking ' Indexing Options' click on 'Advanced'. This window will appear:
Choose the option to 'Index encrypted files' and then rebuild the index. Now when you run searches in Windows Explorer files encrypted with the Windows NTFS Encrypting File System will be searchable.