Windows 10: WD (or maybe WDO) Scan button is grayed out

Split from this thread.​

Have you recently infected with malware?

Try run scan with Windows Defender Offline:

https://support.microsoft.com/en-us/help/17466/windows-defender-offline-help-protect-my-pc
​

I tried to scan it but the scan button is no longer functioning.. its grayed!! the only button that is still functioning says "Start Now" in a big red button!! so what do u advice me to do??

:)

 

Defender Periodic Scanning or Offline Scanning?

That link does suggest it's useful to use Defender offline scanning in addition to periodic scanning and a third party real time anti virus (e.g. Kaspersky).

 

Windows defender custom scan does not scan external drives

I have Defender Windows 10. I tried using custom scan to select and scan external drives. The screen listing the drives comes up, but the "OK" button remains grayed out so unable to scan any of the drives listed. Any suggestions would be appreciated.

 

Windows defender ofline scan

Peter,

Event viewer maintains a record of the scan starting at

Application & service logs,

Microsoft,

Windows,

Windows defender,

Operational,

Event IDs 2030, 5007

• WDO failures that Windows knew about would be recorded as EventID 2031
  
• but WDO failures while Windows was not running would not be recorded.

But there is no record of its completion unless it finds malware detections to report in

Windows defender security centre,

Virus & threat protection,

Scan history.

• The Last scan entry in that dialog refers to Windows defender itself not WDO.

Denis