I eventually downloaded the latest version of Windows 10, build 16299.15. That problem went away and Defender seems to be up-to-date. However, now at shutdown I get a message "system task active preventing shutdown" and i can't find anything to close so click "Shutdown Anyway" which doesn't seem to have caused a problem.
Windows Defender - Virus and spyware definitions couldn't be updated
Anonymous
can't update spyware and virus definitions
Original title/subject: windows defender
Windows for home | Windows 10 | Security and privacy
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
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Anonymous
2018-01-11T15:30:22+00:00 -
Anonymous
2018-01-11T15:14:52+00:00 cant update spyware and virus, it starts download then suddenly stops