Log In Section Problems

So I have a pin in place of my password to access my system.
I have noticed in the last month or so that instead; of displaying the
normal 1 through 9 numbered pin pad: it shows those numbers all
as.. small squares. I think it's something with the system font, I just can't remember
what the font is supposed to be for that part. If anyone just happens to know the
default font for the log in screen stuff.. LET ME KNOW!!!

Thanks in advance for your help!

Bump! still having problems with this...