The 64-bit version of Blue Iris has been crashing my system for a couple of months now. I have built a new system with new and better components and have had the same experience. I think I have narrowed down when the crash occurs. It seems to be with the audio. I have my system configured to sound an audio file when a trigger occurs. I have grouped 3 of my cameras together. When a member of this group is triggered I get rapid fire sessions of audio playback and my system crashes. The audio will hang and the Crash occurs. There is no event log when this occurs of course since the operating system has no idea what has happened. I feel that if the software was changed to prevent successive, Rapid Fire audio output, this might correct my problem.