security. microsoft.com portal shows my Defender Full Scan as "No Scan Performed"

Question

Hi, when I look at https://security.microsoft.com/ devices, my system shows "Last Full Scan" status is "No Scan Performed", I am seeing this on most of my systems. Why are no Full Scans being performed automatically or am I missing something here? I show that "Last quick Scan" was "completed" just no full scans. All my systems are Window 10 or 11 Pro.

Answer 1

@Daniel Ronald, Thanks for posting in Q&A. From your description, it seems your issue is with Defender which we are not familiar.

After researching, I find Microsoft Defender Antivirus allows users to schedule regular, automatic scans on their devices. These scheduled scans can be either quick or full scans, and they can be set up to occur at specific times or after certain events. It is recommended to schedule quick scans as they are sufficient and provide strong protection against malware. Full scans are not recommended to be scheduled as they can take a few hours or days to complete, depending on the amount and type of data that needs to be scanned. It is possible that the "No Scan Performed" status on the Microsoft security portal is due to the fact that no full scans have been scheduled or run on the devices. It is recommended to check the scheduled scan settings on the devices to ensure that full scans are being scheduled and run as desired.

https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/schedule-antivirus-scans?view=o365-worldwide#configure-scheduled-quick-or-full-microsoft-defender-antivirus-scans

https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/microsoft-defender-security-center-antivirus?view=o365-worldwide#microsoft-defender-antivirus-in-the-windows-security-app

However, if the above suggestion can't resolve your issue, you can contact Defender support to get help.

https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/contact-support?view=o365-worldwide

https://learn.microsoft.com/en-us/defender-cloud-apps/support-and-ts

Hope the above information can help.

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