Have a Dell Inspiron 1545,bought Virgin Mobile Broadband2go Ovation MC760.When I plug into usb port it shows up on devices with cd drive,acts like its going to download program and then just disapears.I cant get it to download program to be able to use device.Running Windows 7 64 bit system.Can anyone help.I took device back to dealer was told tough luck,no help at all.Thanks.James.