It would have been nice if only the corrupted file(s) had to be replaced. It would have gone a whole lot faster. Seems like the /source with DISM ought to work. Users would still have to obtain a "source" to initiate the repair, which is a big problem. No question that if MS starts offering repair/installation DVDs that I'll be getting one. I've learned a lot from your suggestions and others on the forums, but I really don't want to go through it again. The MS person who took care of my activation and the rest said that some of the issues were caused when people went from 8 to 8.1 . They saw that 8.1 was free on the store and just installed it. What they failed to do was run WU first. I got the impression that some had never run WU. That left 8.1 actually not installed properly.
Anyway, thanks again for your help. I guess this thread can probably be closed, if you have the authority to do that.
Jim