I updated to 7.4 from 7.3.1 and immediately started to see a "service exception" which is the windows 10 name for a Blue screen of death.
Nothing else changed on the PC, just the version of 7.4. Machine is Win 10, i7 processor, 32GB of ram. Nvidia GX970.
If I turned off the use of the graphics processor, the Blue screens were less often, but LR would just terminate for no reason. After about three of these, I lost all my preferences and stored printer profiles and the LR/Adobe instruction box appeared as you get on new install.
I updated the Nvidia drivers to the latest from Nvidia and started over, re-enabling the graphics processor, and within 5 minutes, got another blue screen.
Never have seen this before on any previous Adobe update to LR.
For now, I have just backed off to 7.3.1 and it's working fine, just finished 5 hours of work, no blue screens or terminations. With 7.3.1 I was seeing the LR hang when LR was minimized for a long period of time, so I may have that issue again, but it's better than a blue screen and loss of everything open.
Just curious if anyone else has experienced similar issues with 7.4.
Paul C