Please visit the manufacturer's website to download the drivers for your device. You can use google to find the manufacturer's website if you do not know it. In the support section download the drivers for your specific make and model of the device for your version of Windows.
Note: If the manufacturer only lists drivers for Windows XP and not for Windows Vista or Windows 7, that means the device is unsupported or incompatible with the unlisted operating systems.
If you do NOT know the make & model of your device you can Search by Vendor / Device code as shown in device manager.
In the device manager, for the device you need driver for, Right click properties for the device, go in details for the device driver.
You will see a code...