Thanks John, Danny and Juan. I went to the Nvidia site and got the update for the drivers. There was a lot of updates on it between then and now. I talked to the local computer guru here and he said he saw no problem with going to Nvidia to get them. If worse camr to worse I could go back to a restore point. In the meantime I should freshen up my computer knowledge some to stay on top of it all.
Anyway, it s seems to have helped somewhat. I still wish i could see the previews in real time. I have not tried to repeat what I did when the problem showed. Other commitments took me away for awhile . I’ll report on the results when I get them.
Thanks again. This truly a wonderful forum with truly wonderful people.