Firmware Upgrade - Upgrade button not available

Hello,

I understand there are over 15 firmware updates available under Advanced/Administration/Router Update/Firmware update assistant screen. My laptop screen cuts off at update no 17. I am not able to scroll down to the bottom of the screen to get access the 'Upgrade' button. Can anyone please help tell me how can I download the firmwares I need for my router? Thanks in advance.

Happy Holidays!