You could try and go to your control panel and install maual, have the PC look for your hub. When you plug your hub in, open your device manager also and look at the USB controller and see if anything is changing, like something is getting plugged in but your hub is not not being recognized.
Seems to me the PC will remember what was plugged into the USB port before. I had used a external drive in a usb port, then I switched to a key drive ( I think is what it was, or I switched to something else) and I was having problems. If I remember, when my device was plugged into the usb I deleted from in device manager and then I installed from the control panel using the add hardware.
