yes Jen, you are right ......patience isn't inexhaustible, but pets and children...well they look at you with those big eyes and you forgive them...maybe not right away.......
As for mending computers - well, I'm not that brave.
I once bought myself a book about fiddling with computers...one of those 'Dummies' books.
I looked at it, but that was as far as I got...the book went to the charity shop in one of my rare 'fling outs'.
I guess it is best to leave it to those who know what they are doing.