On your computer, open Chrome. At the top right, click More Settings. At the bottom, click Advanced. Chromebook, Linux and Mac: Under 'Reset Settings', click Restore settings to their original. On your computer, open Chrome. In the top-right, click More. In the 'Default browser' section, click Make Google Chrome the default browser. If you don't see the button, Google. Learn how to set Chrome as your Default Browser in Windows 10. Chrome is already the default browser on my PC but Microsoft don't give a shit. I'm using Windows 10 Pro. And it's not the only place where Microsoft act like this. When you are on the lock screen, there's a picture with a description. If you click on the description to get more details about the picture, after you typed the password, it open Edge!
Have you downloaded the Chrome Administrative Templates? https://support.google.com/chrome/a/answer/187202?hl=en
Set Chrome As Default Browser Windows 10
Specifically this setting: DefaultBrowserSettingEnabledChrome Default Browser Mac
'Configures the default browser checks in Google Chrome and prevents users from changing them.If you enable this setting, Google Chrome will always check on startup whether it is the default browser and automatically register itself if possible.
Chrome Default Browser Mac
If this setting is disabled, Google Chrome will never check if it is the default browser and will disable user controls for setting this option.
Chrome Default Browser Iphone
If this setting is not set, Google Chrome will allow the user to control whether it is the default browser and whether user notifications should be shown when it isn't.'