On Windows Defender Definition Update error 0x80070643

Update 4/5/2017 4:00AM pst:

Please update to the latest threat definition version (1.239.1022.0 or higher) via Windows Update or the Windows Defender Client UI. If you are still experiencing the same 0x80070643 behavior, we recommend doing one final manual update with the latest packages from the adl portal: https://www.microsoft.com/security/portal/definitions/adl.aspx. From the portal please download and install both ‘Antimalware and antispyware updates’ and ‘Network Inspection System updates’ that works for your system.

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Hello all,

I just wanted to start a thread to have a chance to address everyone and inform you that the Windows Defender team is aware of the situation and working as quickly as possible to resolve the issue. We thank you for your patience and we should have a fix rolled out soon. 

Meanwhile, for those running into the definition update error 0x80070643 (or protection definition error: -2147023293) we recommend you to manually get your machines back to a protected state by following the instructions outlined here: https://www.microsoft.com/security/portal/definitions/adl.aspx.

Please note the manual adl package is designed to update silently. To verify the manual update worked correctly please check with the Windows Defender (or SCEP) Client UI to see if it reports the latest threat definition version. The latest definition version can also be found in the link above (currently 1.239.797.0).

Thank You,

Jason Yim

Windows Defender

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Also moderators, is it possible to replicate this thread to the other category buckets? Such as the other downlevel OS and SCEP.

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bump. Please find my latest update above.

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I'm confused. Here you say you are still working on resolving the issue. On the virus apdate page you are saying that there is a fix being applied automatically on affected computers ?Is there a fix now or are you still working on it ?

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will this fix also be included in the download links for this version ?just curious so I know when ican download and do a clean install with the error with defender is fixed

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I'm confused. Here you say you are still working on resolving the issue. On the virus apdate page you are saying that there is a fix being applied automatically on affected computers ?Is there a fix now or are you still working on it ?

Read the latest update:

Please update to the latest threat definition version (1.239.837.0 or higher) via Windows Update or the Windows Defender Client UI. If you are still experiencing the same 0x80070643 behavior, we recommend doing one final manual update with the latest packages from the adl portal: https://www.microsoft.com/security/portal/definitions/adl.aspx. From the portal please download and install both ‘Antimalware and antispyware updates’ and ‘Network Inspection System updates’ that works for your system.

Issue is resolved now. In case you are still experiencing it, you will have to download and install manual update from the mentioned link. This will finally solve the problem.

Prashant Kumar

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ok.

I followed the page and the steps at bottom 'Your software version number is displayed at the line labelled Antimalware Client Version'.  For version number 4.1.522.0 and above, you must download the Network Realtime Inspection definitions.   Mine is malware client version 4.11.15063.0. 

I downloaded the file for 64 bit.  When I click the file does not run, or pop up or anything show up.   Then I go back to windows update, the error is gone at this moment somehow. 

 

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Yes it has. Downloaded definition update just now through windows update perfectly. No more issues. Thank you

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I want to thank Prashant Kumar and Jason Yin for  their contribution. 

I performed the manual update with the latest packages from the adl portal. After doing so, I noticed the Windows Defender Version had changed to 

1.239.854 the latest for 4-5-17?  I did note the manual adl package updated silently, so much so that I questioned if anything had happened.

Is this a one time manual update or must I do this daily (re-download the adl portal) and install again?  Is this a fix or simply updating anti-virus definitions?

Thank you gentlemen for your assistance.

 

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When I click the file does not run, or pop up or anything show up.

Unfortunately, the manual update has no UI as of now. However, running the file is enough to update Windows Defender. If error is gone by now then this manual update worked successfully and your issue is fixed.

Prashant Kumar

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Is this a one time manual update or must I do this daily (re-download the adl portal) and install again?

Yes, this is one time manual update. You don't need to do this again. Windows Defender will automatically update itself.

Is this a fix or simply updating anti-virus definitions?

It is not just a fix. It's full antivirus definitions.

Prashant Kumar

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Last updated February 23, 2021 Views 63,013 Applies to: