With a trick, you can redirect web Search from Bing in Windows 10 to Google. When you search from the Start Menu or search box, Cortana offers the results from Web and Windows (My Stuff). The search results from the web will open with Bing in default browser, if you want the Web Searches in Windows 10 to open with Google instead of Bing, you can do that with a simple trick.
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Make Windows 10 Web Search to use Google instead of Bing
1. Here you need to be using Google Chrome as default (if not, not possible) to do that.
2. In Chrome browser, install bing2Google extension
3. Now try to type any query in the search box and click on Web icon, the result will be delivered by Google instead of Bing in Chrome browser.