Try going into device manager and delete all unknown USB ports. reboot the computer. You may also want to switch the dongle to a different USB port. From: "Kesavan" <kesavan@xxxxxxxxxxxxxx> To: <amayausers@xxxxxxxxxxxxx> Sent: Wednesday, April 05, 2006 2:41 PM Subject: [amayausers] >Got my Amaya XT. I have assembled it. I pluged the dongle into the puter >and >installed it. I am trying to load the os software on my computer and it >says security device missing. Do I have to plug the machine into the hub as >well for the software to load. > >Thanks in advance > >Anand