Thanks to everyone for all of the suggestions. The issue is now solved. I resolved it as follows: # aptitude install os-prober (It was not installed) # os-prober # update-grub "First, was windows menu there before? " It was, and I don't know when or how it was deleted. I assume that it happened during an update. I can't say exactly when, as I haven't looked to use the windows partition for a while. Again, Thanks everyone. John