To address the issues you are facing with high system resource usage by Windows Security (Antimalware Service), as well as the persistent spinning blue circle next to your mouse pointer, you can try the following steps:
High System Resource Usage by Windows Security (Antimalware Service):
- Perform a Full Scan: Run a full scan using Windows Security to ensure there are no threats causing abnormal resource usage.
- Reset Windows Security Settings:
- Go to Settings > Update & Security > Windows Security.
- Click on Virus & threat protection and then on Manage settings.
- Scroll down and click on Restore settings under Ransomware protection and...