It seems like for some reason it keeps trying to install nvidia-glx.
Aptitude is installing nvidia-glx-260 instead which is already current version.
Linuxmce then says that it has been installed and needs to reboot.
It then when reboots looks for nvidia-glx, does not find and attempts to install again.
I think this is causing the rebooot cycle.
Any pointers to what script is looking for nvidia-glx?