Thanks for your help guys, manage to get someone at Seagate and they helped me with the following.
Like you suggested Pyreee, used CMD prompt, needed the drive # and used diskpart to do it.
Did a quick search, something along these lines.http://technet.microsoft.com/en-us/library/cc738489%28WS.10%29.aspx
It wouldn't work through Device Manager, but the CMD promprt/ diskpart did it.
Appreciate the help though, thank you.