When hardware that's installed in, or attached to, a computer doesn't work properly, it's often because of a driver problem. Hardware and devices require drivers to work properly with a computer.
Here are solutions to some common driver problems.
You can also try running a troubleshooter to diagnose and fix common problems with hardware and devices.
To run a hardware and devices troubleshooter
Click
http://windows.microsoft.com/en-US/windows7/Tips-for-fixing-common-driver-problems
