Problems opencpn windows 7

[Jorgetrip]

Dear sirs. I use a garmin 152 conecting to a netbook lenovo with w7. If i open ozi explorer it works ok, receive the signal, show the position etc.
When i open opencpn it open ok and show the chart, but when
I start the gps appears the blue screen and boot the pc.
I tried whit navigatrix, and it s all ok, all open and works.
Could you give any idea why the blue screen appears?

Best regards