Windows defender error 0x80240018

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HI,
defender is no longer able to update, if i try to manualy update it i get
the error 0x80240018.
Any idea of what is it and how resolve ?

Thanks
 
I have been getting the same error for 2 days now and have not figured out
why yet, even though I've searched everything or place I can think of. Adding
this maybe someone out there can resolve this . I'm sure it's happening to
more people than just the two of us. Any help at all would be gratful for
your input. Thanks,Randy
 
I get the failure to update error as well but mine is:

Windows Defender was unable to complete the update: 0x80070422. The service
cannot be started, either because it is disabled or because it has no
enabled devices associated with it.

It ran fine for a week, then this. The service is started and I can stop,
start or restart it without problems according to the Services applet. I
dont see anything Windows Defender related in the event log when filtering
on Critical, Error or Warning.

Anyone else?

Chris
 
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