Hi Diogo S1,
Welcome to Microsoft Community.
Based on the original description, we understand that your device appears to be experiencing issues related to some of the features associated with Windows Security.
Unfortunately, it appears that the image was not successfully uploaded.
You mentioned “personal computer and I am the only user”.
Does this mean that you are experiencing issues related to the “organization” “administrator”?
If I misunderstand your situation, feel free to correct me and share the information.
Best Regards,
Kyo.Y - MSFT | Microsoft Community Technical Support