No, no it's not the problem.
I have a working dual boot MBR, but no lilo.conf file that correspond to it.
What's the point of backing up a lilo.conf file that is of no use?
I cannot play with the lilo command because if I mess things up, I have no lilo.conf to restore a working MBR.
And the trouble is, I need windows to be the default selected option at boot.
Is there a way to "create" a lilo.conf file out of an installed MBR? I know you usually do it the other way round, but is it possible?