Benchmark question.

[File2ish]

You might be able to tab down to the OK button by hitting the tab key, but some settings menus won't let you do that.

But if not, maybe set your windows taskbar to autohide (right click the bar, properties, check the auto-hide box). It might drop down low enough that you can actually click on the button, depending on your resolution. Or if you have a monitor you can connect to with a higher resolution (or one that will let you put it to a higher resolution than native) you could probably do it.

Or if you're computer savvy and confident about manually changing settings in a notepad interface... I think in the root folder for the benchmark there's a file that will open up with notepad and have stuff like "Antialiasing=0" or "LodType=1" (without the quotes). You can change the numbers on each setting respectively, but I don't recommend it unless you really know what you're doing.