This is really wierd..I tried the camera with Messenger and it worked!Creative still said the camera was being used, so I uninstalled Messenger. Seemed obvious to me that the culprit must be Messenger, but no dice! Creative still wouldn't use the camera.I uninstalled Camtasia, and this didn't help. Creative still claimed the cam was being used by another application.I uninstalled Creative. I reinstalled it, and the camera works!I reinstalled Messenger, and the camera still works!I reinstalled Camtasia, and the camera still works! ???I can only guess that Creative developed some kind of bug, because now all 3 programs are very happily living together without problems.Thankyou very much for your assistance, and I am sorry to have wasted your time.