Many of us, who are currently doing research in the field of image processing or video processing, must have heard of the software library OpenCV. It is a great tool for video and image processing and well suited for practical implementation. However, the installation of OpenCV is not quite straight forward. If you are using a 32-bit operating system, then you are in luck. You will find 32-bit executables ready for deployment. But if you happen to use a 64-bit operating system, you might need to build the OpenCV from scratch. It should be noted that, you can build OpenCV whilst using a 32-bit OS as well. But for 32-bit OS users, there are easier solutions. I will write step-by-step instructions for installing OpenCV 2.1.0 on a 64-bit Windows 7 Professional.