1. Yes. This has occurred since reinstalling the system. It seems to occur after an automatic update of one of the folliwing : KB3013816, KB3000850 or KB3013769. One which failed to configure and had to be unloaded and I am in the process of updating them one at a time. Why does a Device driver failure not come up in your troubleshooters ?
2. Seeing as the problem has been reported within several makes and models of the dvd/cd drives and several motherboard types I dont see that the make and model numers of my two different systems can have a bearing on the case. The cd driver file becomes corrupted and cannot be replaced or overwitten because it is the latest version. The fact that one part of windows detects a problem and is not transmitted to another part of windows and that version number seems to be the only criteria for updating drivers, not whether they work or not.