How to make Google Chrome your Default Browser in Windows 7
As soon as you have downloaded and installed Google’s Chrome web browser on your computer, and launched it for the first time, it will prominently display a button that allows you to make it the default web browser for Windows 7. If you have missed the opportunity, or if another web browser has set itself as the new default instead.
1. Open the Google Chrome Browser.
2. In the top right corner of the browser window there is an icon like the below picture, click it.
3. Then almost to the bottom of that menu, click “Settings”.
4. Once that window opens, scroll down until you see the button like below:
That should do it!