Just bought a new laptop with Office 2013 Home / Student edition included. Went through the Office licence activation fine then got an obscure error message that Office installation cannot be completed because it is already partly installed. It gave a link to the MS website which gave no help at all; essentially it was an unknown problem. Tried rebooting and going through the install/activation process again a few times but always the same useless error message. In the end I thought "f*ck it" and completely unistalled Office. I'm now considering whether to install LIbreOffice or Apache OpenOffice; Microsoft had their chance and blew it.