I recently install Windows 10 as a Guest on one of my ESXi 5.5 host. I then installed the VMware tools. The install seemed to go ok as the drivers for Video, Network, Etc all got updated. However the vSphere client shows that they are not installed. I also seem to have an issue with the machine not being accessible via the network unless I have the console open. It very odd and I have never seen anything like this before.