USB not working? A lot of USB devices, like USB mass storage device, printer, scanner, keyboard, mouse and so on, tend to have device not recognized, unknown device and not working problems. There are two issues that can cause hardware not working problems.

Driver Errors Or Driver not Installed Properly

The commonest cause that lead to hardware not working is that the driver is corrupted or not installed properly. If so, there should be some error messages like USB device not recognized, unknown device and so on.

All computer hardware need drivers before it can work on Windows system. Some don't need a installation CD, because Windows is integrated with some general drivers which can be used instead of the original one from CD. But most of the time, they can work only after the drivers are installed from the installation CD. When you add a new device to computer, you should install the driver for it first.

If a existing component is not working properly, it may result from corrupted or outdated driver. You should download a new one from the website of the manufacturer and install it. That will solve the hardware problem that caused by outdated and corrupted device drivers.

Outdated or Corrupted USB Driver

When you attach a device to computer and there is even not an icon or message shows up at the lower right corner, that means your USB driver is corrupted or outdated. USB driver is used for detecting USB devices that are attached to computer. Without it, Windows will not be able to recognize printer, scanner, camera and so on. If so, you should update it to solve the problem.