There has to be something in Startup somewhere that is causing a browser window to open with Bing. Cortana should not be issue.

You can use the Snipping Tool to capture screen images:

https://support.microsoft.com/en-us/...e-a-screenshot

How to post screen captures:

http://discussions.virtualdr.com/sho...ng-screenshots


How to locate startup programs:

https://superuser.com/questions/1010...-on-windows-10

(AutoRuns is a tool for locating them).
https://docs.microsoft.com/en-us/sys...loads/autoruns


https://www.techadvisor.co.uk/how-to...grams-3615075/

https://www.howtogeek.com/74523/how-...ms-in-windows/

https://support.microsoft.com/en-us/...e-startup-apps