You have two problems there, I'll answer the first but I don't know how to help you on the second one.

The exit code 0xC06D007E seems related to antivirus software flagging your process. Try to deactivate your antivirus software if you must, or avoid packaging your Python program to a Windows .exe or a .pyc (I'm guessing that is what you did?). More info here: How can I prevent the Anti-virus from detecting my app as a virus or malware when another user tries to install it?

For the second one, we need more info on your code and on how you installed scikit-learn (conda? pip? with or without a venv?)