Sorry for the bashing... Of the people who answer these forum questions are there any who work for Microsoft? I was under the impression that the technical questions we ask here were reviewed by Microsoft Engineers. That is why I was surprised that the answer was not here immediately. Is the fix I reported not on Microsoft's website?
I just figured that the top experts on Windows 7 driver problems were answering questions in this forum. But I guess all are welcome to answer questions in these forums, so I understand why I might not get the definitive answer immediately.
The repair shop I asked about this problem had a sheet of paper on the wall next to the counter that had this Regedit fix on it. He told me the problem was so prevalent that he decided to post it on the wall rather than charge customers to do the Regedit for them. So I ask again, if this corrupted DVD driver is such a common problem, why does Microsoft not have a direct link to this fix? And why didn't anyone on this forum not know this?
I expected this forum, being so specific (Win 7/drivers) would be the final word on this fix. By the way, for anyone who needs computer help, the technician who had this fix works for Central Computers in San Francisco.