Here are instructions for performing a clean uninstall of the Desktop Manager, try this is you cannot detect the USB port. http://www.blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/8021/7919/8125/How_To_-_Perform_a_clean_uninstall_of_BlackBerry_Desktop_Manager_software.html?nodeid=160545&vernum=0