Hi HO JO,
Welcome to Microsoft Community.
We understand the frustration of having your device attacked.
I wish I could handle your problem, however, members of the Answers community are not experts specializing in the field of cybersecurity, reverse tracking.
Your device has almost been taken over, and the best option to avoid further repercussions would be to immediately disconnect your device from any external networks, wired, wireless, or from your router.
Additionally, your online accounts such as your Microsoft account may have been affected as well. If possible, you may want to immediately check the security status of the account itself and consider changing your password.
How to help keep your Microsoft account safe and secure - Microsoft Support
For further in-depth assistance related to system permissions, the more experienced community is the more recommended option.
Here are links to the forums where you can raise specific scenarios and share your idea to help analyze the problem.
Windows - Microsoft Community Hub
Thanks for your patience and understanding.
Best Regards,
Kyo.Y - MSFT | Microsoft Community Technical Support