My Logitech Quickcam Installer is gone?

Where is my Logitech Quickcam Installer? I been looking the installer of my website since last month when we got our computer back from Best Buy. Everytime I talk with my sister, I always refuse to show them my webcam because my cam is not working, I need to find the installer first before I can let them see me. I know I put somewhere, but I cant remember where, I lookt at the box where we put all our CD’s but its not there. I look everywhere but I never find it. Im so frustrated now because I really want use my webcam every time I talk with my sister online. Even mike don’t know where it is. I try to find a free download installer online but they give me the wrong one. Its not the one that I want and looking for. So I decided to wait and keep looking. I never lose hope, I know I will going to find it.