An integrated threat protection solution designed to detect, investigate, and respond to cyber threats across Microsoft 365 services.
Hello
I am Prakash and happy to help you with your question, I'm a Microsoft consumer like you.
Do you have any other Antivirus or Program installed in your Computer.
If yes Please Uninstall that Antivirus Program then Reboot your computer and reinstall Microsoft Security Essentials.
In case of additional questions, reach out back to us, and we will be happy to help and try our best to resolve your issue.
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Best Regards, Prakash