https://chromewebstore.google.com/detail/chrometana-pro-redirect-c/lllggmgeiphnciplalhefnbpddbadfdi?hl=en
Chrometana Pro - Redirect Cortana and Bing - Chrome Web Store
Force Windows 10 and Cortana to use Google Chrome and your favorite search engine instead of Bing!
proredirectcortanabingchrome