To change default browser in Windows 10 try the tool from Christoph Kolbicz - https://kolbi.cz/blog/2017/11/10/setdefaultbrowser-set-the-default-browser-per-user-on-windows-10-and-server-2016-build-1607/SetDefaultBrowser – Set the Default Browser per command line or script by Christoph Kolbicz.
Launched SetDefaultBrowser.exe HKLM "Google Chrome"
and itThe following worked fine for me.:
SetDefaultBrowser.exe HKLM "Google Chrome"