Some more information ...
The same happens with the same conditions on Civil 3D 2013 on XP SP3 i86, but the message here is:
FATAL ERROR: Unhandled access violation reading 0x0130 Exception at 1e5dd7d7h.
I think this error occurs when I move mouse pointer over the legend lines (only when the raster is in legend). That's where Civil 3D hangs. Is this graphics problem?
It happens even with Tutorial files (Tutorial 2, Lesson 6)