I have had this issues with Kaspersy for the last few years. And this year it even left me stabbing in the dark during installation. Just tab then enter until I hit luck on the button off screen.
It seems to only be trouble on my laptops / netbooks that have a screen resolution higher than the windows reported native resolution for the monitor.
So dropping back to the supposed native resolution (in my case a square 640X480 on a widescreen laptop display.......go figure) and then everything fits on.
I've reported this each year and this year just got "have you tried maximising the window" on a product that has no window size options and after telling them I had already tried to do this. Great work on knowing your own products.
Any way, I hope this and the other solutions help someone, as the support team can't even give a relevant response.