Here is how to tell which USB devices are using USB 1.1 and which USB devices are using USB 2.0. In Computer Management, go to Device Manager. Right-click on Device Manager and select View > Devices by connection. Then expand the USB device nodes until you see one that says Enhanced Host Controller. Devices listed under this node are using USB 2.0. Devices listed under other USB nodes are using USB 1.1.
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