Hard to say without more data, but I'm not so sure about that - the error code is:
Code:
ERROR_NOT_READY winerror.h
# The device is not ready.
Not sure what device (doesn't have to be a physical device, could be a COM port or any other virtual port device as well), but Explorer rarely crashes on it's own. It's really an appcontainer for all other sorts of code to run inside (Microsoft and non-Microsoft), so without a dump to analyze all we have is the error code, which would indicate it's not actually the shell that's at fault here.