Hello Steef!
I have Windows 8.1 Just bought my new laptop yesterday and I have a My book Live drive in home, is a 3T and I have this software installed in my laptop:
Do you have the same software?
I was able to acces my drive in home from another place in town. (However I had a problem moving my files, becarefull doing this I cant my honeymoon photos… http://community.wd.com/t5/My-Book-Live/Cant-find-my-file-How-to-find-photos-easily-Deleted-Files/td-p/715408 thats my topic on another post.)
Anyways hope that this helped a little.
I downloaded this software from the WD.com site.