I am trying to use a USB musical keyboard/synthesizer. I installed the driver and connected the cable but when I tried to restart, the computer wouldn't boot. It initially didn't occur to me that the keyboard or it's driver could be causing the problem so I narrowed it down...it is definitely triggered by the device being plugged in. However when I called the company's technical support line (Roland is the company), they told me they couldn't do anything for me and it has to be an issue with my computer. So now I have no idea how to troubleshoot it.