Originally Posted by iPod916
For some reason, the 'button' at the bottom right hand corner of the screen does not appear. [It never has]
That's a weird interface glitch that some people have reported seeing, but I've never been able to figure out since I can't reproduce it. Essentially the content of the window ends up larger than the window itself, so the button (and right side scrollbar in the text box) gets pushed outside the window boundrary and thus becomes invisible. (I suspect it might have something to do with using certain resolutions or DPI settings, but that's just speculation.)
Anyway, as a workaround you can use the keyboard quick key to "press" the install button. Hold down the ALT
key and press S
, and the installation should start.