Hello, 79 error code is equivialent to the 49 error code. I would clear the print job and try sending a print job from different applications. The issue is caused by the browser, if you go to print from IE try to find a hyper-link that says print, instead of the print button on the toolbar. The hyper-link will convert the file to a printable file format. Although if there is a newer firmware I would still try and upgrade. I am pretty sure it is the browser though, since I have had many issues recently with 49 error codes and 79 error codes, and I was able to determine that it was being caused by certain websites, and after further troubleshooting I was able to pinpoint it was the web browser.
Hope this helps.....