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Defender Offline scan starts and then immediately reboots


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Guest y2kbowen803
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I am unable to run windows defender offline scan.

 

 

I have seen many matches for this same problem but they were for older versions of windows 10. I am running Microsoft Windows 10 Pro version 10.0.18362

 

 

One unusual thing about this machine is it uses a m.2 ssd drive as its boot drive

 

 

I open Windows Security and select Scan Options->Windows Defender Offline scan.

 

I get the prompt and choose to continue

 

Windows reboots and I see the Offline Defender screen momentarily before the system reboots and returns to windows 10 login

 

 

The last entry in the event log for windows defender is:

 

Windows Defender Antivirus downloaded and configured Windows Defender Offline to run on the next reboot.

 

 

 

I created a USB boot drive for windows defender offline. Booting off the usb succeeds and the wizard starts. The wizard ends with the error:

 

Unable to detect a windows system drive 8004cc01

 

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