Windows failed to install the following update with error 0x80070643

Several users of Windows 10 are reporting that Windows Defender updates are failing to install together with they have a message:

Windows failed to install the next update amongst fault 0x80070643

Windows Defender is failing to install updates

One user reported that the outcome started for him afterward Cumulative Update for Windows 10 Version 1703 for x64-based Systems (KB4016250) was installed.

Another aggrieved user said:

This occupation is non simply express to Insider builds I should add. I convey checked several computers together with the fault occurs fifty-fifty on version 1607, which is the version on consumer computers! How many non tech users are straight off beingness left vulnerable because of this mess up. Also how many volition create manual updates?

@PaulStreeting tweeted to us:

I convey tested this põrnikas on v1607 together with does non apply exclusively to ‘Insiders' but the i pushed to users now..what is worrying is that the occupation happens on v1607…so how many users are doing the manual update? Even afterward that it shows every 2nd error.

Microsoft has confirmed that they are aware of this outcome together with volition whorl out a develop soon:

Thank you lot for your patience regarding Windows Defender update fault 0x80070643. We are aware of the outcome together with trying to whorl out a mitigation every 2nd presently every 2nd possible. Meanwhile, to larn your machine dorsum to a protected state, you lot tin manually download together with apply the latest definition Update.

Check if your Windows Defender is updating automatically

I strongly urge you lot to banking company tally if your Windows Defender is updating automatically. If not, you lot should download together with install the Windows Defender updates manually.

Open Windows Defender > Update > Update definitions. Or else, larn to Settings > Update & Security > Windows Update > Check for updates. See if you lot tin update it automatically.

If you lot cannot together with if you lot are facing this issue, it is recommended that you lot update Windows Defender manually periodically till the occupation is fixed past times Microsoft.

If you lot don't desire to larn into the mess of checking upward for updates, downloading them together with applying them, I propose that you lot purpose a third-party freeware antivirus software till Microsoft fixes the issue.

If you lot wishing to troubleshoot the outcome futher, mayhap this postal service volition assist you lot – Windows Defender volition non update definitions.

Source: https://www.thewindowsclub.com/

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