windows 1809update to 1909 failed 0x80240034

Question

windows 10 indows 10 企業版以wsus升級至1909 失敗

Answer 1

Hi,

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For your issue, error message 0x80240034 means "Update failed to download", so I would recommend to check if you have configured firewall or proxy.

How did you upgrade to Windows 10 1909? Upgrade from WSUS after approved through WSUS or through Windows Update directly which could bypass WSUS?

Does the issue occur on multiple computers or a specific computer?

Are there any error messages occur in Event Viewer\Windows logs\Application, setup, and system?

We could try general steps such as run the following command line as administrator to restart some related services.

net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
Ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
Ren C:\Windows\System32\catroot2 Catroot2.old
net start wuauserv
net start cryptSvc
net start bits
net start msiserver

Also we could run Troubleshooter through Settings\Update&Security\Troubleshoot\Get up and running\Windows Update to check for the issue automatically.

Bests,

Answer 2

Been looking at similar failures with download failures for certain updates. This was across all clients using WSUS, but only for Feature Upgrades & defender definition updates. I could find nothing specifically for this online. In our situation URLSCAN 3.1 had been installed on the WSUS server. This was not allowing any of the .exe files to be downloaded. The logs in C:\Windows\System32\inetsrv\urlscan\logs confirm this. Once the urlscan.ini was amended, to remove ".exe" in the [DenyExtensions] section, the files downloaded OK.