The default Web browser in Windows 8.1 is Internet Explorer 11. In Windows 7, the default browser is IE 10 or 11. During the setup process, Google Chrome 41 prompted you to set it as the default Web browser. If you refused, but later change your mind, make Chrome the default browser from within the program or by changing the default programs used by Windows to open files. You can change the default Web browser at any time.
From Within Chrome
Launch Google Chrome in Windows 7 or 8.1, click the Chrome Menu icon and select Settings to open the Chrome Settings page.
Scroll to the bottom of the Settings page and then click the Make Google Chrome the default browser button in the Default Browser section.
Click Google Chrome in the How Do You Want to Open This Kind of Link dialog to make Chrome the default Web browser in Windows 8.1. Windows 7 doesn't display a confirmation dialog; the default Web browser is changed immediately.
Ensure Chrome is the default Web browser by looking at the Default Browser section of the Chrome Settings page. Windows uses Chrome by default if you see the "The default browser is currently Google Chrome" message.
From Microsoft Windows
Press Windows-S to display the Search charm in Windows 8.1, type Default into the search field and then click Default Programs in the list of results to open the Default Programs section of the Control Panel.
In Windows 7, expand the Start menu, type Default and then select Default Programs from the list of results.
Click the Set your default programs link to open the Set Default Programs section of the Control Panel. All programs are displayed in the Programs list.
Select the Google Chrome program from the Programs list and then click the Set this program as default button to make Chrome the default Web browser in Windows 8.1 or 7.
Ensure Google Chrome is the default Web browser by looking at the area above the Set This Program as Default button. The "This program has all its defaults" message indicates that Windows uses Chrome as the default browser.