Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't work at all.

I bought this because of all the great reviews it had and because I wanted to use a usb switcher between two computers so I didn't have to buy a KVM switch (because I already have all the other switches, and didn't want to spend extra money). I plugged this in and it didn't work at all. Went on the manufacturer's website and found that it should be just plug-and-play, but it wasn't. When I plug it into the computer, it doesn't even get past recognizing the USB device. I emailed the company and they said to try it with another set of keyboard and mouse. Still no luck.