OMG! I'm sorry to read that, mate. My wife already printed over 500 pages wirelessly and she had absolutly no issue. She's using Windows 8 (not upgraded to 8.1). I'm connected to it with USB, using Win 7, and had no problem either.
Card, it should be ok but you can never be sure. There must be some confilct with my network but I can't be bother with the fight any more. The printer got an IP and when I assigned it a static one the windows printer manager could connect to the printer via a virtual port but no test page ever arrived.
Staples were difficult. So I've now got the Hp at only a slight premium. I really hope this one works as I'm running out of printers and I'm not sure I'll get a refund for the difference in the Samsung printer.