You need to Click Start, then right Click Computer and select Manage. From there, locate the Event Viewer and check the log files. If you are getting a Windows error, it is possible that your problem is not with Instant Sheller but something else. No way to know for sure until you can identify the app or service that is causing the Windows error. You may need to compare events showing there to the times in the log.txt file. Also, since you noted this is going to be in a cab, try disabling Aero as it is a waste of video resources ( and may help to alleviate other graphics related errors).