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I have bought a web cam and it uses usb but when I load on the program I get this message Setup is unable to locate working USB port on this system. Require working USB port to continue installation. I have gone to the control panel, Hardware and then to Device manager. When I look in there for the Universal Serial Bus controlers there is nothing there even though I have 2 USB ports on the computer and where going approx 2 yrs ago when I had my old web cam. If you are able to help can you please let me know what I need to do to locate what I need to get it going.