Hey - do you know what? This behaviour is not being caused by aswSnx at all, and in my case Avira was not responsible either. While it is easy to assume that aswSnx loads immediately prior to the lock/BSOD/reboot, as it's starting event appears immediately before the critical event stating that the previous shutdown was unexpected, in fact this is not the case. I can't believe I didn't realize this right from the start, but the critical error mentioning the shutdown is logged AFTER the shutdown has already occured and the computer has been rebooted. Durring this reboot, aswSnx (along with all other drivers, services, apps, etc) loads as well, and by coincidence alone it happens to log it's event right before the critical error we're all seeing. If you're still not convinced, look at the vanilla (ie non-critical) error a few events earlier - it says the same thing as the critical error does, but also states the exact time of the shutdown, which occurs earlier than aswSnx's event. I firmly do not believe aswSnx is at all related to the behaviour we're experiencing.