definition update errors


bassfisher6522

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Anybody else getting definition update errors. For the past 2 days (that I've noticed, could have been longer). When manually checking for updates, I always get definition updates, at least 1. Yesterday and today when doing the same thing, I get the something went wrong with the update and KB def is listed with error code.

To fix this I have to manually open up Defender and run the updates that way, which it does (thankfully). Then back to the all settings and "update&security" and re run the updates and it clears it.

Anybody else having this issue or know someone that is .... it's a freaking PITA for me.
 
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Regedit32

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Yes I've had the same error for KB2267602 (Definition 1.239.752.0) - Error 0x80070643

While it loops in the Update & security panel, I resolved this by opening a elevated command prompt and doing a direct install via command line like so:

Code:
"%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -RemoveDefinitions -All

Press Enter key to execute command to remove all current definitions from 'Windows Defender, then:

Code:
"%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -SignatureUpdate -http

Press Enter key to execute command to install current Signature updates

Then simply open Update & security and click Retry / update to refresh.


Note: It is optional as to whether you bother to delete all current definitions; you can simply run the second command to install the update that appears throwing the error via Update & security.


Having done this, their does seem to be a bug with Microsoft servers attempting to send the same Definition again along with that generic error code; which in this case is pointing to the fact the KB will not install - why?!; because it all ready is installed.
 

bassfisher6522

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I just checked my updates and guess what....that same KB definition update is there again with error message.

So I'll follow your advice above and report back what happens.
 

bassfisher6522

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I just tried it and got this failure....WTF!

C:\Windows\system32>"%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -RemoveDefinitions -All

Service Version: 4.10.14393.953
Engine Version: 1.1.13601.0
AntiSpyware Signature Version: 1.239.797.0
AntiVirus Signature Version: 1.239.797.0
NRI Engine Version: 2.1.12706.0
NRI Signature Version: 116.88.0.0

Starting engine and signature rollback to none...
Done!

C:\Windows\system32>"%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -SignatureUpdate -http
Signature update started . . .
ERROR: Signature Update failed with hr=80004005
CmdTool: Failed with hr = 0x80004005. Check C:\Users\Jimbo\AppData\Local\Temp\MpCmdRun.log for more information

C:\Windows\system32>
 
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Regedit32

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Yes I downloaded that definition as Microsoft suggested but upon running it got a failure notice.

I then renamed the SoftwareDistribution folder and attempting to use a normal Update & security and got the failure.

Then I did as I noted earlier via the elevated command prompt and finally succeeded in installing it; but like you the Update & security still insists on attempting to download & install it again with that error message which in my case can only be referring to the fact there is no need to install an existing definition; but as I said previously that particular error code is somewhat generic and could be pointing to other issues (for example if someone were running a third party security program that was interfering with the installation).
 
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I have had the same problem with this download.
Also when i have a failed Defender update i have always managed to download from the control panel it has never failed.
upload_2017-4-5_0-9-29.png
 

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