This is sort of my 'last resort' boilerplate. When nothing else is helping, this sometimes gets one a clue. And it is handy to know. When all else is failing and those helping have run out of suggestions, look in the viewer’s log files. The viewer has various log files you can read to get an idea of what has gone wrong. Look at the log immediately after you crash or exit the viewer. Logs are replaced the next time a viewer starts. You’ll find the logs in: C:\Users\[Win_login_ID]\AppDat