Microsoft’s Security Essentials should not get in the way. It does not get in the way on my set-up. You don’t actually need the CD if you don’t wish to use SmartWare’s back-up facilities. I didn’t use it.
What might help is to install Smartware as this installs Apple’s Bonjour mDNS client. If you don’t wish to install Smartware then install the Bonjour Print Services for Windows ( https://support.apple.com/kb/dl999 ). Once you’ve done that then instead of addressing the drive as MyBookLive address it as MyBookLive.local. ( http://MyBookLive.local )
See how that works.
