Thank you for the speedy response.   I did not receive an error.   I have already been through all of listed steps to resolve the issue which required many hours.   I am having the exact same issue as everyone on this posting.   I click to open QB, and the second it finishes opening it crashes (immediately closes without anything else popping up on the screen).  This is all versions, and my clients are also having the same issue.   It started right after updating. 

Greatly appreciating your assistance, 

R Houghton