in recent builds i could measure with hwinfo during cubase beeing active.
in this build NOT.
in fact this is the first time.
the driver you are talking about is the standard windows7 64 bit driver for the firewire port.
this has caused never a blue screen.
it's hwinfo causing this,
may be asking this port during other programs access.
it would no more be possible to run hwinfo with cubase at the same time.
forgot to say:
the blue screen came just at the moment, when starting hwinfo.
you could say, just when scanning the devices.