Connecting 6720 Classic via USB crash PC USB devic...

When connecting 6720 Classic via USB cable to my Acer laptop all USB ports on laptop seize to work and Windows display a message that the USB device has malfunctioned. Eventually the PC is permanently stucked and only way to proceed is reset laptop on power button and prior to that remove the laptop charger to entirely power it off and let it reboot on battery. Harddisk controller is permanently indicating with a green light but harddisk is not spinning. When this happens the Nokia phone does not prompt for USB usage (connection type) and is also hanging in application execution for a while. I would like to be able to configure the phone not to charge via USB, but have not found a way to do that. I believe that the charging via USB is creating a low level hw driver and power surge problem in my laptop. Problem is not consistent but happens from time to time. When connecting the normal 230 VAC charger to Nokia device so the Nokia device is charging when connecting to laptop via USB the problem does not occur. In this situation the Nokia device will not try to charge from USB connection.
Any possibility to disable the charging over USB on the Nokia 6720 Classic device??

I had the same problem with my 6720 when I connected it to my HP laptop via USB to download maps. It crashed my computer making all USB ports unusable until I restarted the computer again. I think it happened after I downloaded the necessary software upgrade. I had to eventually use bluetooth to transfer maps data to my phone. It worked without any hitches. Can someone at Nokia fix this problem with the USB?

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