
I now downgraded the Netduino itself to 4.1.06 again (not enough code space for my program in 4,2).
PC Information:
Windows 7 64bit (fully updates from MS)
VS 2010 Professional v 10.0.40219.1 SP1 Rel
NetduinoPlus Driver information:
(right click on the NetduinoPlus device in device manager)
6.1.7600.16385 by WinDDK
.