If you can print other PDFs but not a particular one it is very likely that the PDF size is A4 (the longer, skinnier Asian paper size) instead of the North American letter size ( 8.5" x 11"). This breaks printing in most cases. Or it may print if you find a program that ignores the size issue.
Here is an example of an A4 being rejected by a printer in Ubuntu Linux via CUPS
Cannot print PDF CUPS Samsung C460:
Processin........
This was very annoying but has a simple fix, I had an echo and the voice quality was absolutely horrible (it sounded like tin cans under water) if that helps describe it. It was extremely distorted.
The simple Skype sound quality solution
Go to "Options" -> "Sound Devices"
Disable the "Allow Skype to automatically set my mixer levels"
After doing this the sound qua........