If you are installing a device driver for a new piece of hardware, or more often, installing the same driver as part of a re-installation process, you may find that the installer will run but the driver wont install.
There are many reasons for this, but, more importantly, the question is ‘if the installer program wont install the driver, how do I get the driver put in?’
The answer is to go to Device Manager, find the piece of hardware you are installing, right-click on it and click on ‘Update Driver’. Then you follow the prompts, browse for your device driver, and click OK.
This should allow the driver to be installed.