What to do when your USB device doesn't work
Clearly, something is broken. But is it hardware, software, the device or the computer? That's going to take some experimentation. First, let's get the obvious out of the way: Unplug the device, then plug it again . Did that fix the problem? If not, unplug it again, reboot your PC, and then plug it in again. Did that help? How about trying another port? No? Well, it was worth a try. Since the problem persists, let's get on to more serious tests. Try the same device on another PC, and try another USB device on your PC. If the device fails to work on both PCs, you have a defective device. You might be able to fix the problem with a driver update. USB devices are supposed to install their own drivers when you plug them into a PC, but occasionally that doesn't work. Go to the device manufacturer's website and see if there is a Windows driver available. If you there is, download and install the driver. If that won't solve the problem, accept that you've got a d...