Thanks for the direction on that, it led me to a clue that seems to have done the job.
The tip was the multiple screens. CC was up in the main display, and when I opened "screen resolution" and changed one of the other screens to the main screen and it cleared right up.
Restarting to just the laptop display didn't do it; the problem still happened in that case, have not tried since the fix.
Mouse trails settings didn't seem to have an effect in this case, I tried that before adjusting the "main display" setting.
For future troubleshooting reference, I am using Windows 7 enterprise edition, on a dell 5510 laptop. The dual monitors for that laptop are both Dell monitors.
Thanks again for the close support on this issue, it is much appreciated.