No, your problem is completly unrelated. Not sure how you define "not showing up" and "already in use" as he same problem.
Try these fixes for serial port in use:
http://www.cmiyc.com/blog/2012/10/08/arduino-fixing-serial-port-in-use/
No, your problem is completly unrelated. Not sure how you define "not showing up" and "already in use" as he same problem.
Try these fixes for serial port in use:
http://www.cmiyc.com/blog/2012/10/08/arduino-fixing-serial-port-in-use/