davehc, that's what I meant, the filters is what MS Fix-It-All corrected. In my case, what I believe happened, was that I had removed some unwanted burning software (some of that Ashampoo crap) using Revo Uninstaller. I used the most aggressive option, I noticed a few days later that my optical drive wouldn't install MS Office.
Tried to watch a regular movie DVD, no good. Fortunately, I had the Fix-It-Center on my PC. It repaired all in 2 minutes.
That simple tool can do a lot of good things, not everything, but it's good to have on hand.
Cat