@Facelift
The normal updates don´t destroy the boot loader of the MK... !
Take it out for 10 hours, or removes the blue plug, and the "Reset" of it is next day o.k.

I´ve done so and after this time the update worked fine.
(no reset knob on this part !)
But also note: A described CD with red permanent pencil can bring uncontrolled reflexions, especially if the CD is slightly transparently. If anyone will write on the CD, then take care and please write outside on the edge.

Greets
Norbert