When I am in a sketch if I activate the rectangle tool as soon as I place the first rectangle I am unable to zoom unless I cancel the rectangle tool. I have restarted my machine and run the latest update but this has not solved the problem. If I run Solidworks 'out of the box' it works fine so I assume this is to do with my settings but not sure what.
Go to System options / Sketch / Enable on screen numeric input on entity creation and un-tick the box.
This will solve it.