How to Fix Drivers in Windows 7
When you have a hardware device that does not work, such as a CD-drive, it is likely the result of a driver that is not working properly. A driver that is not working properly is generally caused by the driver being out of date. Fortunately, the Windows 7 operating system includes a tool that allows you to update any driver automatically. You must be connected to the Internet for this tool to work properly.
Click "Start," then "Control Panel," then "System and Security" and then "Device Manager."
Double-click the driver you want to repair. The Properties window opens.
Click the "Driver" tab.
Click "Update Driver" and follow the prompts. Windows 7 will automatically locate and install the driver update. You may be asked for your administrator password.
Restart your computer when the driver has been updated.