FRM, I don’t know what kind of computer you have but as I recall the update did not take anywhere near 12 hours. Also I can’t help but wonder why you’re only getting to it now? The update was released back in December last year.
My PC is a Dell Optiplex 990 Intel core4 3.3Ghz 8Mb ram, HD500Mb, its resonable fast. Obviusly this update was defective, it even didnt reboot the system.