I'm trying to follow this tutorial: http://www.matthewjmiller.net/howtos/customized-cover-letter-scripts/

I downloaded the cover letter.tex, and I'm trying to 'typeset' it. So I press the green play button in TeXworks, and that's what I get.

! LaTeX Error: File figures/UILogoLG3L' not found.

See the LaTeX manual or LaTeX Companion for explanation.

Type H for immediate help.

...

l.14 } % ?

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closed as too localized by Stefan Kottwitz♦Dec 31 '12 at 0:30

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Do you have a file UILogoLG3L (with some graphic extension such as .png, .jpg or .pdf) in the subdirectory figures to begin with? –  egreg Dec 30 '12 at 22:24
I have uiuc_logo.eps That's what the author has on his website. –  piratepartypumpkin Dec 30 '12 at 22:25
Well, you should call that file. –  egreg Dec 30 '12 at 22:27
As it's not of much value for the public, it's just a file name issue, I'll close this question as too localized. If there's any reason to let it open, edit it or comment and let us know. It can be reopened. –  Stefan Kottwitz Dec 31 '12 at 0:29

That error means that it's trying to use an image file that doesn't exist. If you download the logo from the webpage (at http://www.matthewjmiller.net/files/cover_letters/uiuc_logo.eps), create a figures subdirectory, place the logo in that figures subdirectory (under the directory that contains your .tex file), and rename the logo file to UILogoLG3L.eps, you should be able to compile the document successfully.
I think you have to use LaTeX instead of pdfLaTeX to work with EPS files. You could convert from EPS to PDF so that it works with pdfLaTeX. The EPS → PDF conversion will preserve the file format better as it's a scalable (vector) format. As for the missing font, that is Bitstream Charter and is provided by the charter package. It should be supplied by MikTeX, though it may not be automatically installed. –  godbyk Dec 30 '12 at 22:54