Some Device that doesn't have drivers installed in their Operating System will ignore the device itself and will not used by the operating system. For example you got an old Graphic card installed to your computer then you gonna reinstall your windows after the Installation you may find that your graphic resolution doesn't adjusted properly, the Aero desktop doesn't transparent anymore. well it probably Windows can't use your graphic card as it does.
And today were going to show you how to install the Drivers manually for free, you may find it some software driver finder can't actually find your device or you must have to pay for the software to download the drivers.