As per title After installing a number of updates today, I got the Bluescreen on reboot, accompanied by the CRITICAL_PROCESS_DIED message. I restored back to a drive image from last week, and tried reinstalling the updates, one at a time. KB 2930275 requires a reboot, and having applied the update again, the Bluescreen occurred again. Tried it on my laptop as well, and the same thing occurred. Both my PC and my laptop are on Win8.1 Pro x64, with the unofficial "Spring update" (KB2919442 & KB2919355) Anyone got any ideas? Cheers all.