My laptop has given up the ghost (Motherboard). I decided to recover the data from the HD with an external USB drive box. My main computer recognises there is new hardware added. It then recognises the type of drive etc. Unfortunately it then reboots the main computer. This cycle continues until the external drive is disconnected. The external drive case is fitted with two USB connectors at the computer end of the cable but it makes no difference if one or both are fitted. Am I missing something?