Aw dang! I didn't see the words, "using some of your older Ritek burns". These were blank, brand new Ritekf1 discs for the above two tests. The discs should be genuine- I bought them at Staples.
OK, I'm redoing it, here it is with one of the older discs with which I've had intermittent trouble. This should be a Verbatim disc-burned two or three years ago. Okay...about three minutes into the process of trying to read this disc, Opti says "Unable to read disc label". OK, trying again. "Unable to read disc label". The strange thing is, I installed Office 2007 using this disc just a few days ago (burned disc, not from factory).
So, knowing that I accidentally scanned two blank, newer discs above, and now Opti can't read the old Verbatim written disc, can you suggest what this all means and what to try next?