Interesting. So the Desktop operating system sees the device just as the laptop OS does.
Prior to the commencement of hostilities or, problems, when you clicked on the GPS device (drive letter G:?) in Windows Exploder on the desktop, what appeared? The reason I ask is because in a previous post you wrote that when you double-clicked on the G: drive it asked to insert media. What did it do prior to the issue?
Have you tried a different cable? (Just for sh**s and grins!)