Hi
Welcome to Microsoft community.
I'm glad to help you.
Do you have other antivirus management software installed on your computer? If they exist, you can temporarily uninstall them and check whether the problem disappears.
At the same time, create a new local administrator account and check whether the same problem exists. Check whether it is caused by account problems.
If anything is unclear, please do not hesitate to let me know.
Best regards
Derrick Qian | Microsoft Community Support Specialist