How do I make my WD 640GB Essential bootable

WD External Drives WD Portable Drives
2

If you backed up everything through Acronis, you should be able to do a full restore through it.  And you should have been able to make the drive bootable through Acronis.  However, if you’ve backed up all your files through SmartWare, then you should be able to retrieve them.  However, you might have to retrieve them to a “Retrieve” folder in your Documents.