I don't believe this is a hardware problem. When I try to delete such 'hanging' print job, the status message changes to 'deleting' but even this operation takes two or three minutes to complete. Eventually (probably after five minutes) the print job state changes from 'printing' to 'error'. Well, these print jobs don't actually keep their 'printing' status forever. However, the print job again stays in the queue window virtually forever with status 'printing' again and nothing more happens. The printer fan starts and the display shows 'DATA'. Yet sometimes, a couple of bytes seem to be sent to my printer. Both would happen with the first byte received. I can monitor this at my printer: The cooling fan doesn't start-up and the 'receiving data' LED doesn't blink. The print job stays in the queue window virtually forever (see below) with status 'printing' but nothing is sent to my printer. While both, the adapter cable and my OKI printer have been recognized and flawlessly installed by Windows 7 (64 bit), I can't print: Most of the time just nothing happens. I've connected my old OKI OL810ex printer to my new computer using a USB Centronix adapter cable.