Dear Sarah,
Hello! Welcome to the Microsoft Community. I'm glad to be able to assist you. If I misunderstand your question, please let me know promptly.
You seem to have a page error problem after opening Edge, and the error code is "RESULT_CODE_KILLED_BAD_MESSAGE". I understand the trouble this problem has caused you, and I will try my best to help you solve this problem.
- Disable extensions
It may be that an extension caused the conflict. In Edge, click the three-dot menu in the upper right corner, select "Extensions", and then disable all extensions. If the problem is solved, enable extensions one by one to confirm which one caused the problem.
- Reset Microsoft Edge
Open the Edge browser, click the three-dot menu in the upper right corner > "Settings" > "Reset Settings".
Select "Restore settings to their defaults", which will delete all settings and restore them to the default state.
- Manually delete Edge's data files
I know you have tried clearing browser data, please try to manually delete the data folder to see if it helps
Right-click the Start menu, open "Run", and paste
%LocalAppData%\Microsoft
Click "OK" and a folder will open. Delete the "Edge" folder in it.
Disclaimer: Your browser automatically saves temporary internet files to help pages load faster. Clearing this cache will sometimes fix website issues. Please back up all your personal files first, such as Favorites, to ensure you do not lose data.
- Check the following thread, which is a response from Independent Advisor Greg to this question and may help you:
How to fix error in Edge, "RESULT_CODE_KILLED_BAD_MESSAGE"? Every - Microsoft Community
- Change to another version of Edge
If the problem persists, you can consider using the preview version of Edge, or try uninstalling and reinstalling the original version of Edge. See if different versions of Edge behave differently.
Microsoft Edge WebDriver | Microsoft Edge Developer
I hope the above information is helpful, if you have any questions, please feel free to let me know.
Best Wishes
Pyke.D | Microsoft Community Support Specialist