My friend's computer has vista on it. she downloaded an update of sp1 for it from microsoft, now the operating system(vista) will not work, nor come up on the screen. She never made a recovery point, repair disk, startup/boot disc, or anything that could be used to save her computer. How would I fix this? What can be done to the computer so it will work again, without costing any money? how would I get a copy of a repair vista disc for free?