1. Create a Windows User with Administrative rights. 2. Log on with that user 2. Create a folder for the mdf file. 3. Remove rights from that folder for all other Windows Users excpet the user you just created. 4. Encrypt that folder with windows encryption (owner will be only the user you are logged on) 5. Go to Services and change MSSQL service user to the user just created 6. Copy MDF to the encrypted folder and attach database 7. Log off