Picture going black with LiveMotion

Hi, I have 6 web cameras (4 Creative Live Motion and 2 Phillips). I prefer the LiveMotion due to Pan/tilt but also have 2 Phillips due to high light sensivity of only 1 lux.
My problem is that it seems to occur some kind of problem with the LiveMotion webcam driver. I am running 5 webcams 24/7 in my vacation home and it is quite annoying when the picture goes black on the LiveMotion cameras. It is several weeks (sometimes moths) between each time I visit my vacation home so I do not have the opportunity to disconnect and connect the camera (USB-plug) to reinstall the drivers.
This have happened once on three of the LiveMotion connected PCs and twice (now for the second time) on one of the PC/webcams. I have noticed that on old/slow computers the image may go black but is possible to retrieve again by reducing the image resolution/size, frame rate etc. However all these LiveMotion cameras is connected to Pentium 4 PC's with Windows XP pro SP2 and a minimum of 1 GB RAM. 2 of the PC's do however not have USB2, only USB1/1.1
Visiting my vacation home I was able to disconnect the webcams and reinstall the driver and got back a correct image (not black) and the mentioned 3 LiveMotion Webcams and PCs. Now (6 moth later) for the second time the image from one of the webcams has gone BLACK ...and I am not able to fix it by reducing image size, frame rate etc nor can I reinstall the webcam driver since I can not disconnect and reconnect the webcam cable.
Any suggestions on what to do/try to fix this problem remotely (over winXP RDP)?

That shouldn't happen. Reboot and hold down the option key. Choose the Lion Restore Disk to boot from. Select Disk Utilities from the menu and run Repair Disk.

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