The easiest way to increase the size of the font should work fine
for you Rock. I usually make mine a little bigger by changing
the resolution but you probably won't need to do that and it's
more complicate and troublesome. Even Windows 7 doesn't seem to
be able to do it the way it should be done.
Right Click on the open desktop. From the menu choose the
bottom one, "Personalize".
In the window that opens up, on the bottom left, choose the top
one, "Display".
From the next window that opens choose a dpi size. I have mine
set on "Medium" on the 2009 Dell with the 24" monitor but have it
set on "Larger" on the new Dell with the 22" screen.
Just click the little radio button to the left of which one you
want to try. I'd go with "Larger" and see how it looks first.
Then click the "Apply" button, don't forget that. It's grayed
out in the screenshot but will turn hot after you change the
setting.