If I turn off the DV camera connected to my VAIO computer, I cannot properly shut down Windows Me. Why?

If I turn off the DV camera connected to my VAIO computer, I cannot properly shut down Windows Me. Why?
or
If I turn off the DV camera or disconnect the i.LINK cable while the [DV Video Camera] window is on the screen, the system becomes unstable and I cannot close the [DV Video Camera] window or Windows cannot be properly shut down. Why?

To resolve the symptom, you should close the [DV Video Camera] window before turning off the DV camera or disconnecting the i.LINK cable.