Why is Acrobat Reader 7 displaying the text in my document in Greek letters?
The document was not created with embedded fonts, and Acrobat 7 is substituting the font with the closest “guess”, in this case incorrectly. Either contact the creator of the document and ask them to embed the fonts, or install the required font on your computer. Although the required font may be installed in the Windows directory, it may be necessary to copy it to the Program Files\Adobe\Acrobat 7.0\Resource\Font folder on your hard drive.