I've had my box just over 2 weeks now and had issues with access violation messages when switching from 3D back to 2D although I don't use the network so can't say if that was affected on my set up or not.
I had installed the software to a different partition, but reinstalling it to the default C:\Program Files (x86)\ seems to have cured the problem (despite some advice on the forum to install it anywhere but there on a 64bit system)