I Received an ORF File by E-mail. How should I Open It?

We got this question from a reader who had just been sent an e-mail with an ORF file attached and wasn’t sure whether opening such files is safe or not. Moreover, if it is safe, what software would he need to open it? Because Windows did not seem to be able to handle the file with the regular programs installed.

• I Received an ORF File by E-mail. How should I Open It?