Connect the digital camera to your PC.
Switch on your PC and start up Windows.
Open the "My Computer" windows and double-click "System" in the Control Panel.
Open the "Device Manager" page and then select "Imaging device."
Select the "Dual mode DSC (2770) " under the "Imaging device and then press "remove"
After you done that, unplug the camera and if windows ask you if you want to search a proper driver for your camera just cancel the procedure.